Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4634b564c95924f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 11:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d573bdbf1295a46385c9bd86debf7df7 SHA-1: 55dcf9cb0e4aa60fafdb647a33a5d9ac7b64f582 SHA-256: b4634b564c95924fe59f0f270b8fdbc5bf696e9833c02a14f9b9148d269ca212
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector, ttraff.com. The document body, though partially corrupted, suggests a lure for downloading 'concrete admixtures', aligning with SEO spam tactics to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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=concrete+admixtures+pdf+free+download In PDF document text
    • http://wirewi.charlesheinerfiction.com/uploads/1/3/0/8/130873822/dazivofulipodev_sudijekodusid_ramifubosi.pdfIn PDF document text
    • http://files.rblnutrition.co.uk/uploads/1/3/1/4/131411688/mateni.pdfIn PDF document text
    • http://files.nsdypaa.org/uploads/1/3/0/9/130969045/binab.pdfIn PDF document text
    • http://xawanumav.teressamediumreadings.com/uploads/1/3/1/3/131383284/gudaburipi.pdfIn PDF document text
    • http://files.cms-ma.com/uploads/1/3/1/3/131380995/kogisizo.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/1/0433/0687/7080/files/kipisoluni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/economist_feb_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/tapibajoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/battlemech_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/62968670676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/archeologia_classica_holscher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/9887761669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2956/9429/files/bupuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/sindrome_de_automatismo_mental.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/fejub.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 5368 bytes
SHA-256: 9a0a6207dfde18c29c56fef305e1a132f110afbc0fab90f1d00536f9e2bebe50
font_01_sfnt_off000073be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BE 2116 bytes
SHA-256: 49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640
font_02_sfnt_off00007d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D89 10324 bytes
SHA-256: b59703e19a9faeed598b7760a4d48a458833a04a7e4215a5e883c9fd99bf53e2

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