Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ffc55722d4407c…

MALICIOUS

PDF

46.3 KB Created: 2020-07-30 04:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ef0e5a38750727ad004907424e517c35 SHA-1: 11917b95103f374c90344d57cbf021f14751dbc0 SHA-256: a4ffc55722d4407cce4edc9471d4a5fedb0b15a6e0ba07dfa5fc4acba08525a9
194 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a significant number of external links, including one pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. The presence of numerous links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination or to appear legitimate. The document body is heavily obfuscated and unreadable, providing no further context.

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=degradacion+del+plastico+pdf In PDF document text
    • http://files.jjfshoes.com/uploads/1/3/2/6/132682030/625fa55.pdfIn PDF document text
    • http://files.pokeberryexchange.com/uploads/1/3/0/7/130775786/7367018.pdfIn PDF document text
    • http://files.eeteepees.com/uploads/1/3/1/8/131858044/f60b51.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/1/0435/1534/7103/files/sidapitonesawedal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1342/0702/files/45111299623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/padamemuxegowarezuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/64249304465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/dakufulepuzimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/voxadolasexojeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0843/4077/files/47728238486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/94773584955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/85379283368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/14825527549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6259/9584/files/simiteki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/21785089711.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 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_off00007601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7601 5108 bytes
SHA-256: 5202e7ef0614d62ad11c238f317abebebf65b8a5dbcc73c5c090c0584da21d86
font_01_sfnt_off0000876c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x876C 11340 bytes
SHA-256: 41ba0e029e8fb124f396235bee96c79063a51b63ff81571808e6aec86e43626e

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