Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5907451ab5307bf…

MALICIOUS

PDF

34.4 KB Created: 2020-08-02 19:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21aa5249eaf5d9e0fc0d4ce81d876d97 SHA-1: ae957578ef2df558bd5d2570136ef7665d60b20d SHA-256: b5907451ab5307bf846fdf40599bd813866dbefda2bd9aa79fd5a13e37976aed
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body text and embedded links suggest a lure for downloading content, likely malicious. 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=boosie+no+juice+download In PDF document text
    • http://files.letipcm.com/uploads/1/3/1/4/131406835/738461.pdfIn PDF document text
    • http://files.highadventurecomics.com/uploads/1/3/1/4/131438419/sarili_simulis.pdfIn PDF document text
    • http://files.brockportjunioreagles.com/uploads/1/3/1/4/131437981/2675961.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/1/0437/1690/3080/files/zirexenaxogitipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5672/5153/files/20636274464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/65661153987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/jowuduwokuludesobokager.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/84756106951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/11929530914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6449/1174/files/fogitaxupowowigekuvatijiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30036161276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6125/5073/files/sovum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/xetaguf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/jofojema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/nekepekamurubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/20189935080.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 3

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_off00004911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4911 5052 bytes
SHA-256: 0e469d4554001ec60b050115337f807bf3918c0982165a5ba35609745378a7d0
font_01_sfnt_off00005a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6D 10132 bytes
SHA-256: b16ea9f3dc0695ba56e31a19dcaa0c5994b8b08d6572072eff6e6a6c5ece5522

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