Malicious PDF — malware analysis report

Static analysis result for SHA-256 67680e8395c25d5e…

MALICIOUS

PDF

53.9 KB Created: 2020-08-19 01:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76dff4a851aa78e8c584a5730f301b01 SHA-1: 05bcd20b5ec26491ba1f79c6c96ba90b2eaba3d4 SHA-256: 67680e8395c25d5ed6b8f7aea8ca70d428d3cabaa45a17eb559ef670cf843760
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to further malicious content. It also hosts a large number of external PDF links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability 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=annotation+processor+android
    • http://files.marialosee.com/uploads/1/3/2/8/132815148/gulebunil.pdf
    • http://files.oktakemtrading.com/uploads/1/3/2/6/132696351/169d9e8a2a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/fadag.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/xevusenukasolipejowarep.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/29760547971.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20011772627.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/latexoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/rupenebuwefofowomejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/film_anime_romance_sub_indo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/1st_edition_monster_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/vajumibumazokumem.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_off00008e62.bin
543807a55e778cf0541b7efc7eb89aa110e9873c9995b5c594c921cf26e2a595
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E62 5024 bytes
font_01_sfnt_off00009f77.bin
782aa040d786771c52f99db17f86eae9b12d43a24b40eda1a9a3e35af1d4f6df
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F77 13600 bytes