Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c483852dc7f102…

MALICIOUS

PDF

72.9 KB Created: 2020-08-17 01:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e7c8748ea5d7684f56217c331ba596a SHA-1: 035b33fe4ab9534949678589b1719542870605d4 SHA-256: 92c483852dc7f10243f48bf53f7e2caa217ab49acc10c5aab055fa20a6144845
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves luring the user to this malicious site.

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/pify?keyword=in-+depth+interview+guide
    • http://files.graffitiwgratitude.com/uploads/1/3/0/7/130738814/808e7b1556b9ad.pdf
    • http://files.marleymaedesigns.com/uploads/1/3/2/8/132814342/wilifatenasodedor.pdf
    • https://cdn.shopify.com/s/files/1/0440/9013/0584/files/familismo_amorale_banfield.pdf
    • https://cdn.shopify.com/s/files/1/0440/7489/3477/files/66251932488.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/34228068366.pdf
    • https://cdn.shopify.com/s/files/1/0438/6357/2635/files/wudivor.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/kojezet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/xulafafamaxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3896/4903/files/loli_hentai_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/muzupubibulo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4269/files/vogiduja.pdf
    • https://cdn.shopify.com/s/files/1/0439/1131/5611/files/54950534430.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/hoja_de_seguridad_del_acido_acetico.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/xibakulopajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/agility_drills_for_soccer.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_off0000e1cb.bin
5c46db83f42498687696001d1302d9cbfb6878ff2461b2d94af1fd6f0ee872b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 4924 bytes
font_01_sfnt_off0000f29d.bin
ee503f953edf2528bef819e3101fa03191d06d0ee3a5c95dec50ff39c03354da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 10688 bytes