Malicious PDF — malware analysis report

Static analysis result for SHA-256 564742e13839b1be…

MALICIOUS

PDF

44.5 KB Created: 2020-07-29 11:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fddb43fb9efb253b573cc8ecb4a5ef75 SHA-1: a864b9b657aff438191cfa52c534326ee768deeb SHA-256: 564742e13839b1be730fa60ebfff2b002443d85138a6870c8e4a7751c3504c07
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO spam PDFs. The presence of many links, including to a redirector, suggests an attempt to lure users to malicious content.

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=normalidad+y+anormalidad+psicologica+pdf In PDF document text
    • http://files.wildfenstudio.com/uploads/1/3/0/8/130814058/95bc1abb70e8.pdfIn PDF document text
    • http://files.collectorsartists.com/uploads/1/3/1/0/131069992/52a5f60e4004a4.pdfIn PDF document text
    • http://files.lesmarmitons-sandysprings.org/uploads/1/3/1/4/131453682/zisipubovozi.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/1/0428/5153/2963/files/ninolufowiseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/2870577842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/sudulemukizumagadazewuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/52836060746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/puturekapifozofiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/lafuwisazokuxewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/15284970624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/wobawowokisewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/bafoduwidojedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2337/6277/files/bivibuxonuzimonigowodiwaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/92276175141.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 5

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_off00006edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDF 5136 bytes
SHA-256: 870e11887ccf685cefdbd5ba214db5d2abbeac8515a241a2741d1a42c18536c1
font_01_sfnt_off00008032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8032 10896 bytes
SHA-256: f7e011854e2246f773675e2bd52ceeec5ce245a39cc076f0ab19e75f5da489e5

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