Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e129991de323536…

MALICIOUS

PDF

90.7 KB Created: 2020-08-15 02:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b8cb48ac8d675c91572db4ce79c4721 SHA-1: 16c6d81d30d21ea4a004382b0be3770a012cdc52 SHA-256: 3e129991de323536a2518d058c97ffaf73d34e1c9b22c7f397756eb816fff591
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that is also present in the heuristic firing. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger link farm designed to improve search engine rankings, likely as a lure.

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=school+of+thoughts+in+psychology+behaviorism+pdf In PDF document text
    • http://files.cfirthwssu.com/uploads/1/3/0/7/130775411/a38b3.pdfIn PDF document text
    • http://gijam.willardfreedomfest.com/uploads/1/3/1/6/131606339/samub.pdfIn PDF document text
    • http://files.yisonline.com/uploads/1/3/1/4/131438077/5574541.pdfIn PDF document text
    • http://files.mindbekind.ca/uploads/1/3/2/7/132740172/xikemo.pdfIn PDF document text
    • http://files.vflhabersham.com/uploads/1/3/1/3/131380342/60c967e465090.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/1/0433/9109/0844/files/bitujukaxofulafox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/zefixepijuwiwoxasozukeguw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/kepulazebif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/pawifesopexanojovatori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/lightest_reader_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/94109450923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/how_to_cite_dialogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/3172597535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/kusuwigesagosakekoxepuruw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/a_view_from_the_bridge_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0854/0315/files/38354143396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7705/6165/files/xuwekukikiwikanubegitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/sopidadimafunerimeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/farming_simulator_2017_starting_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 5976 bytes
SHA-256: 1377d5bf65ae29b16a701b4e160e96a5f7122f104571bab642a0bb0fdbe5b29e
font_01_sfnt_off00012df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF4 15156 bytes
SHA-256: c49e51c4e3a64e8a74d82c6034702c1a74727b8d0cd70990eb6d029057252698