Malicious PDF — malware analysis report

Static analysis result for SHA-256 166f841751c27059…

MALICIOUS

PDF

87.9 KB Created: 2020-08-07 05:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 48925dacd7b05ed0469fa4e68ed7a1b6 SHA-1: dd34cffbc1205162db549f876a7d74513423d61b SHA-256: 166f841751c2705919950a01c31ce424335abb59379c6464b43dc44370eb5cfc
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious sites. The embedded URL points to a redirector that uses a keyword related to a PDF download, likely a lure for phishing or malware. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an intent to redirect the user to a malicious resource.

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=sociological+perspective+on+culture+pdf In PDF document text
    • http://files.punchlinemarketing.com/uploads/1/3/1/3/131380008/b582e96c8.pdfIn PDF document text
    • http://zesofaxug.detourla.com/uploads/1/3/1/6/131607062/5610902.pdfIn PDF document text
    • http://files.eudaimoniatravelblog.com/uploads/1/3/1/3/131380592/wimajuxewig.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/1/0428/9835/8432/files/pedarivorenali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/serikol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/95303647089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/gadivuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/minions_songs_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/92833678662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/gudakapuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/gejujefebidavovozivet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/magamazoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/tefirusozuxenabit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0397/6614/files/wibun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/91359516270.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDE 5488 bytes
SHA-256: fa166c44b429482194a2968598495e7a68dbd0e1c4d2bdfbaca9bd5bc6062754
font_01_sfnt_off00012ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA5 10580 bytes
SHA-256: 586d345ff436dc0e4f5d60c99e901997847415f4a426c3ca1b23d537c6d25780

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