Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96eb9aca3e1adfe…

MALICIOUS

PDF

52.2 KB Created: 2020-08-18 14:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1548deabefc8333364a3a80c757b9d1f SHA-1: 557078304e42a5cb60ce3afb461451b074339c09 SHA-256: c96eb9aca3e1adfedb2e1658e456b69cab70bca4328e216725a41d86c3d4a978
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as legitimate documents. One embedded URL, 'https://ttraff.cc/pify?keyword=sheet+music+pdf+flute', is identified as a malicious redirector. This suggests the document's primary purpose is to lure users into clicking malicious links, likely leading to further compromise. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or redirection attack.

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/pify?keyword=sheet+music+pdf+flute
    • http://rubanu.jessikasmithmusic.com/uploads/1/3/1/4/131437736/96c0e682e2e4.pdf
    • http://files.sweettreeevents.com/uploads/1/3/1/4/131455337/kosowevofavo_sufekudages.pdf
    • http://files.motorcitybrewtours.com/uploads/1/3/0/8/130815664/798675.pdf
    • http://vibog.kingdomofcavaliers.com/uploads/1/3/2/7/132740249/5682418.pdf
    • http://wopitufi.irokkit.com/uploads/1/3/1/4/131437756/6883567.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5355/files/voxujawiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/nurokagaxudipumul.pdf
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/lagemosakowemoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3313/files/32898768207.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7810/files/bumiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/assassin_s_creed_identity_mod_apk_real.pdf
    • https://cdn.shopify.com/s/files/1/0434/3539/3191/files/doxokudixujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1300/5724/files/great_are_you_lord_all_sons_and_daughters_lyrics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b0c.bin
3baab6ad0eb5446f46ce6aa3e2c404c2fa4e88a4be4d26ca54502b38c2ddcf78
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0C 5192 bytes
font_01_sfnt_off00008c9c.bin
86268a6a6ec84cbe15ddafe435bd2412cce6853e1ec18578694fc0ca3f0c9785
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9C 9988 bytes
font_02_sfnt_off0000af28.bin
9cfb948b915a4694feeb7f8719f2b65905b0a58e2ed918074a610570d07e7249
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF28 16100 bytes