Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5f08fa36fbd99f…

MALICIOUS

PDF

40.4 KB Created: 2020-08-16 01:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d37da7ff69deb7245b632c81c8361d8 SHA-1: bd77ceb12f60be91b55f9c9083f2bf772b2a674b SHA-256: bb5f08fa36fbd99fff63590c34699605e709053c27e6e54c47b2cbb29f5f52d3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as a lure. The overall structure suggests a link farm designed to manipulate search engine rankings or distribute malicious content indirectly. No scripts were extracted, and the document body is heavily obfuscated.

Heuristics 3

  • 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.
  • 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/wb?keyword=guia%20insulinizacion%20pdf
    • http://files.cookbuilderssupply.com/uploads/1/3/0/8/130813923/8880bc7b4.pdf
    • http://files.griffingazette.com/uploads/1/3/1/4/131452872/tuvuliwu_batimivakidaxir_ximugupudokunu.pdf
    • http://files.achsmembers.com/uploads/1/3/0/9/130969254/9359418b149.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/42382728522.pdf
    • https://cdn.shopify.com/s/files/1/0431/6633/5142/files/40392765771.pdf
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/nibasubifusolepak.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5908/files/cognitive_approaches_to_lexical_semantics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexikebesadunav.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/polarity_therapy_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/jegetobaxajepepoweg.pdf
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/lepukegevufabipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/79624118337.pdf
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/mathematics_project_topics.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/mathematics_of_finance_petr_zima.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/les_pays_du_monde_et_leurs_capitales_par_continent.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/zafavofukiwavejeb.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_off00005d0a.bin
5a3c1005f7ce0ff221cbcee63cadb7aba97b86947316b3485481d00545efe9c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0A 5136 bytes
font_01_sfnt_off00006ea4.bin
fd43da18c6d459e0aafe5e51e9ff1cfb963054c377957506e5769f3e717f1431
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA4 11392 bytes