Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067cdfe9a562fc4…

MALICIOUS

PDF

45.3 KB Created: 2020-08-31 14:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f37e0bc103b1a276a67423fe533d93 SHA-1: 8f25a6dfa97df20ac8961ce8fe2c8e3c12692b16 SHA-256: 0067cdfe9a562fc4b5a037cfa7fd5a7cf44b2eb2c98a552e058480599cdffdd1
154 Risk Score

Malware Insights

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

The PDF was identified as malicious due to its inclusion of a link farm pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous external PDF links suggests an attempt to obscure the ultimate destination or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wix?keyword=le+guide+du+routard+philippines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3e87bf_cf368e51afce48248796e3000ab53254.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_e3b0c8ccdac0450e98f5106d75ea5ce3.pdf
    • https://static.usrfiles.com/ugd/b8c837_02d3e4587d254423a7fbd95ea432ab12.pdf
    • https://static.usrfiles.com/ugd/724fb5_49ee72fc81884432a0cc9b6ed235a29d.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb5827ff099f4b069bf1397fac961bc2.pdf
    • https://cdn.shopify.com/s/files/1/0462/1867/4330/files/bekudogobegoxewugifasibip.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/understandable_statistics_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/8908/2006/files/katozusabepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/ravisivezawineguraxam.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/pharmacology_of_antihypertensive_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0434/9103/3250/files/dagugupex.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/87589056222.pdf
    • https://cdn.shopify.com/s/files/1/0432/4520/7714/files/38243347537.pdf
    • https://cdn.shopify.com/s/files/1/0437/1536/2984/files/vukozixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/52800404417.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1073/files/alphabetical_series_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/32095918775.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f0.bin
a69b392f38e0f9a81d822b99e9c6d4ca2e91abb1c2879b117f8fa460f354792f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F0 5164 bytes
font_01_sfnt_off0000767d.bin
e14e18e6b5ac17ce102d000cf81b5f5896faa99b2398bab200b68048dc65ef32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 16324 bytes

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