Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba46c0d6a4cfddb…

MALICIOUS

PDF

48.5 KB Created: 2020-07-30 23:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f5bb3127ff990440301ffc7accd76adc SHA-1: a6b39607e0f7f3f987d80f63b41df863d2042708 SHA-256: cba46c0d6a4cfddb65ac6b4a76daa2a0873e2ffee1d997d5631e12f7dd52be74
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Cambridge English Grammar'. The presence of a link farm and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a malicious site for further exploitation or phishing.

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=cambridge+english+grammar+in+use+essential+supplementary+exercises+pdf In PDF document text
    • http://files.tinytailsk-9rescue.com/uploads/1/3/0/9/130969818/gegaxeboruwegexumob.pdfIn PDF document text
    • http://files.somonaukfire.org/uploads/1/3/2/6/132695329/misisiba.pdfIn PDF document text
    • http://files.nwgyfl.club/uploads/1/3/1/4/131483772/mowapeluz.pdfIn PDF document text
    • http://files.theapostolicchurch-newlife.org/uploads/1/3/1/8/131871621/d4a714.pdfIn PDF document text
    • http://files.keithdeininger.com/uploads/1/3/0/7/130739509/9505567.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/1/0440/3570/2949/files/fobefipebadaviwenof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/18137382977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/rowuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/49600910443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/dasof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/10705525266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/lobamuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/66698220471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/godanozuvuxefojub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/zedobudovesaregemaso.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5676 bytes
SHA-256: eb65a924cba13946cb10175aa45a7cf6ade8500f2920d74f2330b480e932f321
font_01_sfnt_off00007c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 10088 bytes
SHA-256: 5bca8a2f720720ee24e8c9fb6b8708f7aa96daa050979898af17c7325477185c
font_02_sfnt_off00009f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2E 16068 bytes
SHA-256: 5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8

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