Malicious PDF — malware analysis report

Static analysis result for SHA-256 93df1671156fdae8…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 17:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b13984be77fb30b1f99f24d1d6c4ea53 SHA-1: c73d25ccc68cb5f2b996b16dd3560a30609e2484 SHA-256: 93df1671156fdae81a3a028cb8693d8b51f104904b6d53530ed401f41cebcca8
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is a known malicious redirector. The document body and heuristics suggest a lure related to payroll and accounting applications, intended to trick the user into clicking the malicious link. The presence of a link farm further indicates a phishing or malicious redirection attempt.

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=payroll+and+accounting+applications+pdf In PDF document text
    • http://molujiten.9footvoice.com/uploads/1/3/0/7/130776407/jirefegazasebun-wumonifuxu-dafuvonot-kegidijemasovad.pdfIn PDF document text
    • http://files.elmhurstelitetutoringplace.com/uploads/1/3/1/6/131606745/jizun-bomofola-rasediz.pdfIn PDF document text
    • http://files.windsweptwillow.com/uploads/1/3/0/7/130740571/4c9ca.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/1/0438/3480/2333/files/benixukigetezegatomamow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7817/9221/files/25657869683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6583/4658/files/bekupitibiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/11604928321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/tavujoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3844/0598/files/55027308288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/36070341595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/desumubepuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/kegedolula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8080/9625/files/biregarezuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/23274340519.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
🗂 Part of campaign: windsweptwillow.com 3 samples

Related samples 4

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_off000069b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B4 5428 bytes
SHA-256: b53d573ff11f133227aac11e870a396294addac0a28127c9e7a32cb2e3f79a78
font_01_sfnt_off00007c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C47 10536 bytes
SHA-256: 51a0dbd19f3b6fd304c18a818c91d5c6819d4f71acc465825f97be7941f0cf13

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