Malicious PDF — malware analysis report

Static analysis result for SHA-256 c878b7def8f0aec4…

MALICIOUS

PDF

42.4 KB Created: 2020-08-01 06:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 587ea91efef3dac6ea4d60d50716951f SHA-1: 4f5c9fa028ba0ad7914595cf474b7f7578586cc0 SHA-256: c878b7def8f0aec4374e7fceabc7bdd32886aa861fe25916c0c9cba3688ce860
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of numerous links suggests an attempt to distribute malicious content or phishing pages through a link farm strategy.

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=when+things+fall+apart+pema+chodron+pdf In PDF document text
    • http://files.ussrbalham.com/uploads/1/3/0/8/130815437/pusazojegebu-lagefezurimal.pdfIn PDF document text
    • http://files.abby-humphreys.com/uploads/1/3/1/8/131871744/denarineviwiv.pdfIn PDF document text
    • http://files.stackhousepark.com/uploads/1/3/0/7/130776409/2668435.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/1/0432/1935/3757/files/xivudoropewonin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/86289041431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/wopogalufiwimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/ramugutusazuromavunatapub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6361/4369/files/70729878689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/58245971812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/meburadagadev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/74140048101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/fikabodakeletajerujemisak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1117/7639/files/24344804072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/54042628567.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_off000065aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AA 5580 bytes
SHA-256: 5ee33df9500a2556647624d67bd3ee418ec685b0bb1e783041a6fbcc82f741e9
font_01_sfnt_off00007890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7890 10628 bytes
SHA-256: 2396b07dfed14e604ef8ec358434d924c8a2d7d92eef0d898c596a16786947a7

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