Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55e657772a9f0a8…

MALICIOUS

PDF

65.9 KB Created: 2020-08-01 05:36:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b93ae509578b84cc2df59542d2abbc1d SHA-1: d533f288e61e7c740f1916ae61e579c018b15279 SHA-256: a55e657772a9f0a8ac5bd677a6226c7c91fb6f3652a0d42801fc908143d2c9fb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the link farm and redirector heuristic are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=jquery+on+radio+change In PDF document text
    • http://files.savannahconcretecontractors.com/uploads/1/3/1/4/131453894/6782364.pdfIn PDF document text
    • http://files.silveressencefloatingspa.com/uploads/1/3/1/3/131379343/6993498.pdfIn PDF document text
    • http://files.nineravensstudio.com/uploads/1/3/0/8/130873781/5737509.pdfIn PDF document text
    • http://files.beckeras.no/uploads/1/3/1/1/131163859/dibawafitexo_gujufewiz_merevevi_xujukubigi.pdfIn PDF document text
    • http://files.trillastable.com/uploads/1/3/2/6/132680784/vovulexozobaw-putenu-tufarerel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7455/0949/files/sakufetikezarefabuwipoteg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7315/0869/files/hillsborough_county_schools_report_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/83196651737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/5288326152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7955/5486/files/42596233951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/suwenudagun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/kejalovutekumigazelujatin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0445/files/zisefepaneneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/32678432512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/sogubuwejorunevabaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/sowirikidetelixub.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6874 7252 bytes
SHA-256: 6a89fe47d72759a2bc28d02a2ceea3cae774c48e57b50081499908179fb30c71
font_01_sfnt_off000080e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E3 5012 bytes
SHA-256: 2a1f59e6e361721d2581ad70e7d342616f959f1a0dcaea20ceef2cd43040c81f
font_02_sfnt_off000091cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91CF 5300 bytes
SHA-256: bb44f9e0888cf129cf33b9df11e2ad30047d5ca80bd870f2b5398cabdc3c9180
font_03_sfnt_off0000a4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4BD 14980 bytes
SHA-256: 74435b782032a09f729511837f84edd5d3fc23d17d5c5725c537909ff58e489e
font_04_sfnt_off0000d435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD435 16900 bytes
SHA-256: 83bef66c6561b95eb5a2b1d1e7e397f6314a1592f594bbe4b43077e8fac9c90d
font_05_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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