Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ccfe1a2f53e569…

MALICIOUS

PDF

45.6 KB Created: 2020-09-01 08:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 522cb381cfa53df862aafbb9bef1676b SHA-1: cad8e28e14c601a584fe79c1759c2a5b2c7dc44b SHA-256: 70ccfe1a2f53e569660bc8c84b718aed7b8f79dfe25f718636fa9aa6a2cd2b4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains references to the same URL. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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.com/wix?keyword=test+retest+reliability+spss+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3bf302_ba13dd024053478cad5b89cd2247d97a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f72ec573f884ae893bda899ac3d085f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a38d6fa4cb47484080ed3b800154c22e.pdf
    • https://static.usrfiles.com/ugd/5ed537_1bc04ac6014140498a9620a0c0a387ee.pdf
    • https://static.usrfiles.com/ugd/16a96a_c779985cb88541d3998a5e7127d927d4.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/ritufotavevilum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/sixafipowek.pdf
    • https://cdn.shopify.com/s/files/1/0445/5114/3588/files/american_college_of_rheumatology_lupus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/antonyms_and_synonyms_list_with_meaning_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5089/1424/files/62221489566.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6551/files/60904543570.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/per_la_gloria_d_adorarvi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/valvular_heart_disease_guidelines_esc_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/4962510008.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/18670712510.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/namiwonironozal.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_off00007503.bin
7f1614b568375fb136b144ad6f6ba56bb69ae90505ed071d32741d66837911ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7503 5224 bytes
font_01_sfnt_off000086d8.bin
66f2b8147bde763ff47d1e66ea9586959e6cb121a118a56c4b26d5baa157aadb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D8 10176 bytes

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