Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae7dcbd6243d8d1…

MALICIOUS

PDF

69.7 KB Created: 2020-08-11 17:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5154edfd9b8f0c6b34edb2c3a9763c97 SHA-1: 40d1177fb233f2a9c14335feefab443c90993ac8 SHA-256: 0ae7dcbd6243d8d17fa13f48eafddeb3d8526590bd32a64d45d5bdc1f4121996
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a questionnaire. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm or SEO poisoning tactic. While no scripts were extracted, the document's structure and the malicious URL indicate an attempt to redirect the user to a harmful site, likely 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=emotional+intelligence+questionnaire+for+teachers+pdf
    • http://files.documentsresearch.net/uploads/1/3/2/6/132695491/narawojodag.pdf
    • http://files.siceyourlife.com/uploads/1/3/0/8/130874204/842884.pdf
    • http://files.umbertobuttigieg.com/uploads/1/3/1/4/131438397/4469093.pdf
    • http://files.journeys4life.com/uploads/1/3/2/6/132696194/ccdbd266caa5e68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/36583453762.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/banjara_nama_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/world_countries_and_capitals_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0435/9687/3885/files/breath_of_the_wild_stalnox.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0710/files/27469140923.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/56701910375.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/46249819174.pdf
    • https://cdn.shopify.com/s/files/1/0437/2008/1563/files/les_catastrophes_naturelles.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/2665270922.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/mefagediverumom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4823/files/xujegexem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/tinkers_construct_2_materials.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/kobidukuximip.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f3.bin
04cbced52c2ed1006e334178452b619c2be09a0f8b3b48bec5acd10c857748a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F3 5532 bytes
font_01_sfnt_off0000d787.bin
fb739fe55440e76aa3759638e0a024ed8810972151d843a572e72f12662fac0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD787 10352 bytes
font_02_sfnt_off0000faf9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 4324 bytes

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