Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3864c9a9f43f39…

MALICIOUS

PDF

69.1 KB Created: 2020-07-28 06:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a2dbd04fe9be5f8ea82142e7fc5f636d SHA-1: 569f2b45ec336d18c245d9c566d9724f7b03393d SHA-256: cb3864c9a9f43f397de8c87c32b41626a2c5bbbce4190ad3f56019f3ddad5009
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'guide book'. The presence of numerous Shopify-hosted PDF links, many of which are benign, likely serves to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

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=annapurna+circuit+guide+book In PDF document text
    • http://files.justicefordrew.com/uploads/1/3/1/3/131380008/6561362.pdfIn PDF document text
    • http://files.centralarintermodalauthority.com/uploads/1/3/1/4/131454466/zenawofe_texar_rorufafamat.pdfIn PDF document text
    • http://files.taylorhwilliams.com/uploads/1/3/1/8/131857049/caef260c8c4.pdfIn PDF document text
    • http://files.rileyannsound.com/uploads/1/3/1/1/131164350/2314473.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/1/0429/2175/4787/files/tuguxavijipuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/2256454363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/87135900194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/82855926652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/57667900277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2636/files/36293446213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/wirisul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/10799665689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/wafobepaziminojafusurarej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/pafudinemovigukogelilezon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35535883354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8869/0841/files/12439599080.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_off0000d164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD164 5104 bytes
SHA-256: c482c5818de16955b6fc2e00eaf74a70d776bf1aabfc1fd4ac7113020be0b864
font_01_sfnt_off0000e2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BE 10620 bytes
SHA-256: 628cc198b1e2093ec438809fd26fb3719ea610bdfd357d08549324bcf8ced6ff

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