Malicious PDF — malware analysis report

Static analysis result for SHA-256 76105ab3556c7480…

MALICIOUS

PDF

57.1 KB Created: 2020-08-05 11:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a20c5d181740d9661a1fcf43b438204 SHA-1: d81a74f776fa20540a1ea2f4b029525e8088ccc9 SHA-256: 76105ab3556c74808949e357052df6875bd4e5473f96b1dbb23de3edb1f389c4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, including a primary redirector URL that appears to be part of a link farm designed for SEO manipulation. The document body, though partially corrupted, contains text suggesting a lure for downloading a PDF related to 'important days and themes', which is a common phishing tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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.com/pify?keyword=important+days+and+themes+2020+pdf+download In PDF document text
    • http://files.firstireton.com/uploads/1/3/1/3/131383982/f5f4dbf9.pdfIn PDF document text
    • http://files.slocampnpack.com/uploads/1/3/0/7/130776401/jofagupasob-sajajopaban.pdfIn PDF document text
    • http://files.purplestottltd.co.uk/uploads/1/3/2/7/132741334/rigipojijiwizafes.pdfIn PDF document text
    • http://files.ajmagic.com/uploads/1/3/1/4/131438142/bawetofekafudalek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/35502148597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/95954708336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/8431356701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9550/7615/files/zezenawutasifafagezumaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/xetuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/40728368301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/63900817757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/44238867033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6774/4160/files/lozure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/milodaporugorupofaxuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/pijimijajivame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/kawasaki_zzr600_workshop_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9113/2567/files/73587631481.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

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F10 5684 bytes
SHA-256: 82c2209e8437a0f1548e191e4999e348493215b055969e81f9ef4f1c9fc2b763
font_01_sfnt_off0000b259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB259 10664 bytes
SHA-256: 03322ecf900bceb504ff3aeb6f5d856f7c57be7d825f7a17ec6e8b3e5334adab

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