Malicious PDF — malware analysis report

Static analysis result for SHA-256 150b6bf055585b12…

MALICIOUS

PDF

33.9 KB Created: 2020-08-21 17:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c7a1866cfc384bbb29697efe3ec41ef SHA-1: 05028ffaead5eb1a1f1facd82d2471b3deb9a82b SHA-256: 150b6bf055585b123e18c2160dad7ac538edb09e4f2c6d0e8fa4a8a91a0105d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=cinta+luar+biasa++andmesh, which likely leads to further malicious content. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the embedded links are the clearest indicator of malicious intent. The presence of a link farm suggests an attempt to distribute malicious content widely.

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=cinta+luar+biasa++andmesh
    • http://files.kingsfellowship.net/uploads/1/3/0/7/130738971/5393ef7e7728.pdf
    • http://files.daaa.org/uploads/1/3/1/6/131606890/dae9f824a8f054c.pdf
    • http://files.coburgantiquemall.com/uploads/1/3/0/8/130874495/309eb832.pdf
    • http://files.brushdartistry.com/uploads/1/3/1/4/131438557/gojatudunapowu.pdf
    • http://pazewori.godlovesyou.tv/uploads/1/3/1/3/131383664/9060112.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/fokivovatoridef.pdf
    • https://cdn.shopify.com/s/files/1/0430/8543/0945/files/nobotimu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4299/4336/files/36447902171.pdf
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/dugijefofuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2617/7438/files/fallout_4_unlock_command.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6269/files/44373696703.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/99456186317.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26160609228.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/6389442072.pdf
    • https://cdn.shopify.com/s/files/1/0437/5075/2417/files/25121040670.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_off00004822.bin
b8d801f4511806269d7832cd40c7746004ad8ce6f1d1977bc404ab652118a5b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4822 5108 bytes
font_01_sfnt_off0000593e.bin
b323626361bc1bb7393aaee61f8122eb43e54779ccf78b80d25e8b21b9dbe162
pdf-font-stream PDF embedded font (sfnt) at offset 0x593E 9864 bytes