Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc22ff7a8c240f12…

MALICIOUS

PDF

37.5 KB Created: 2020-08-31 10:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f1501869befd568e0eba604764982d1 SHA-1: 0cbb1b9c2638a63a365fb9a74b0754607948b475 SHA-256: fc22ff7a8c240f120401c16ab5ae65c15687293211a2e79d4db8778809670b69
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments that appear to be related to downloading song files, suggesting a lure. The presence of numerous other links to PDF files hosted on various domains, including Shopify, indicates a potential link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted, and the primary malicious activity appears to be redirection via embedded URLs.

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.ru/wix?keyword=ek+villain+songs+free+download+pagalworld
    • https://static.usrfiles.com/ugd/ce14f3_35647680d17c49ffb88ee881aa97f4c2.pdf
    • https://static.usrfiles.com/ugd/07e02c_66dee68d66c14cbb83c9338330656adf.pdf
    • https://static.usrfiles.com/ugd/405339_8b4988e8197c47979408b72338b393c0.pdf
    • https://static.usrfiles.com/ugd/f46427_b31f6c22a11445d4b4613731341d9a9a.pdf
    • https://static.usrfiles.com/ugd/865d50_523b2e07f21744ebadecdd07a0e742b4.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/movuxuligidanavugumu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/ccnp_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/air_force_manual_32-_1084_facility_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0438/5131/7408/files/jerimozolamapubepotaz.pdf
    • https://cdn.shopify.com/s/files/1/0462/0989/2505/files/nukopisopogekilemikume.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/bayesian_analysis_for_the_social_sciences_jackman.pdf
    • https://cdn.shopify.com/s/files/1/0448/1505/7056/files/ar_95_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4992/files/fusionner_pages.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9426/files/pifogina.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/tuxiwibesedawuzugimok.pdf
    • https://cdn.shopify.com/s/files/1/0461/4707/6259/files/903795484.pdf
    • https://cdn.shopify.com/s/files/1/0439/1459/2408/files/71270483651.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005328.bin
8452d73318b025a851032f5acf674bc2f640ec6378a3979bfb4340549bf3bc51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5328 5380 bytes
font_01_sfnt_off0000659e.bin
61871255a7b500370bcec3d4ea1756d13a2ad34de115e504def13cad052a6ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659E 10328 bytes

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