Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e038c937d5c940…

MALICIOUS

PDF

36.4 KB Created: 2020-08-03 21:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 105e5698cb0797643b884cbcc68847cb SHA-1: 80839fab81bf8019c2fa54e987f0055fdcd2d1c6 SHA-256: 69e038c937d5c940bba2eec8f78a50378d380922930e8ddb548ada97393bf12c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to benign Shopify domains but one critical link to `ttraff.ru`, identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and keywords suggesting a link farm or SEO spam tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/pify?keyword=organic+chemistry+functional+groups+quiz+pdf
    • http://files.havehopeforthejourney.org/uploads/1/3/1/4/131453276/2447945.pdf
    • http://files.yogamuseinc.com/uploads/1/3/0/7/130739379/kuwamogubid.pdf
    • http://files.palm-beach-divorces.com/uploads/1/3/0/7/130775640/5104052.pdf
    • http://files.forwardoutdoor.com/uploads/1/3/0/9/130969061/jotemona.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/68211370079.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/speedy_eggbert_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/tilutodakazememodibopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/86013702961.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/60575317762.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tijubijevuvikupox.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7785/files/aluminum_design_manual_2015.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/77548389787.pdf
    • https://cdn.shopify.com/s/files/1/0431/7066/0508/files/sotilonowok.pdf
    • https://cdn.shopify.com/s/files/1/0431/4732/9702/files/mamatusoloziru.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0439/files/technical_drawing_tools.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/9840704230.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_off00004ccd.bin
0e620b79ac939344ac2ab5f1bb643fa74c370459c55f702213a7cbd1a280d916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CCD 5876 bytes
font_01_sfnt_off000060ab.bin
e10ffe0e3b15e317a0d98de4ae3e9d769cc606efb5db5963e77377460934de32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AB 10660 bytes

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