Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c87ad30627b740a…

MALICIOUS

PDF

39.8 KB Created: 2020-08-04 01:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26f8a26c96877e4b928009ee681d90c2 SHA-1: 3889f2ce941c3b1cad150ff461a998203c93b449 SHA-256: 6c87ad30627b740a83d7202831744be00c01b638f1cba1c937a0d650dbc1b604
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO abuse tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=fahrenheit+451+anticipation+guide+pdf`. This indicates the document is designed to redirect users to malicious sites, likely for further exploitation or phishing. The ML classifier strongly supports the malicious verdict.

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=fahrenheit+451+anticipation+guide+pdf
    • http://files.disabledandproud.org/uploads/1/3/2/6/132695734/38ca50615cfe.pdf
    • http://files.tammydavid.com/uploads/1/3/1/3/131382700/tisozigifijev.pdf
    • http://zolili.wineworldcup.co.uk/uploads/1/3/0/8/130813420/eee34bc51f.pdf
    • http://files.audacitycoffeeroasters.com/uploads/1/3/0/8/130815277/tevupukufimax-sopemu-niroda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/28892474871.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/28728454136.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/xuganifavutasegediwazawas.pdf
    • https://cdn.shopify.com/s/files/1/0438/2267/8173/files/notosufuzamukorerinefi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/28555334067.pdf
    • https://cdn.shopify.com/s/files/1/0428/2001/0140/files/rust_lang_blog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/la_vida_a_travs_del_espejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/lawujaradufodugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/80509923139.pdf
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/zamebotatufetawuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/zorugusuvexetumasinudawo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/sap_bpc_optimized_for_s_4hana.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_off00005d6f.bin
854e042a316eb9ff12b22971e1bd9512d82f3de42164677c9574199098ae9161		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6F 5424 bytes
font_01_sfnt_off00006ff3.bin
e5fe3b59c882ffbf52d42a2e07e2d82bc0aff1dfc1b9386942f97db4226ff592		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF3 10072 bytes

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