Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0bf2a765f2d5103…

MALICIOUS

PDF

35.5 KB Created: 2020-08-08 10:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ebef47fb9fe0ee2730d52584dd70f79 SHA-1: a36639f4744e86fc38bc064394f8178f1f24fdc9 SHA-256: b0bf2a765f2d5103fca0764a28adfd02ff633da3dcb173a334cab630f50f67c3
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at `ttraff.cc`. The document body, though heavily obfuscated, contains text referencing 'Endangered animals word search pdf' and the tool used to generate the PDF, suggesting a lure to disguise malicious link distribution. The ML classifier 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.cc/pify?keyword=endangered+animals+word+search+pdf In PDF document text
    • http://siwusa.rivercityfalconclub.org/uploads/1/3/0/7/130776433/bawusivi.pdfIn PDF document text
    • http://files.stannesbirmingham.com/uploads/1/3/0/7/130740530/57990.pdfIn PDF document text
    • http://files.davidperlock.com/uploads/1/3/1/1/131164473/7338928.pdfIn PDF document text
    • http://files.green-hopefoundation.com/uploads/1/3/2/6/132681891/1b34e651.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/1/0433/4016/9384/files/1129716875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/lowes_livingston_tx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/atkins_meal_plan_phase_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7406/8390/files/72122526539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/mifenakodaberebin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/70164170471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/baixar_livro_o_poder_da_cabala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/wetelirutaruxokojabunumox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/15782321741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/wimepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65788935473.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 6

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_off00004a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A6C 5620 bytes
SHA-256: 8582a5ff0747d480a8bbb19996b4c196e3fba05bebc3488be638a9fad07171d3
font_01_sfnt_off00005d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 10372 bytes
SHA-256: e560b235bdc394eceb6b1f24e9bc4913658401c9baaf76724136a2296a00be3c

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