Malicious PDF — malware analysis report

Static analysis result for SHA-256 3716d1b7f9b51f42…

MALICIOUS

PDF

43.7 KB Created: 2020-08-27 16:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7590969043a10d8bbf3c1ee12f1d1e4e SHA-1: b0a3ee1d079d4c509d7a4a14081d0ea593210676 SHA-256: 3716d1b7f9b51f423bae2a29741eb8e711dbaf9e969e838a68e6ce1d33272bdf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the primary redirector URL. The presence of numerous links, many pointing to Shopify domains, suggests a link farm or redirection strategy to mask the ultimate malicious destination. No scripts were extracted from this sample.

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.com/pify?keyword=modelo+clasico+macroeconomia
    • http://files.stellarcarevacations.com/uploads/1/3/2/7/132741109/5032976.pdf
    • http://files.etamucaliforniadkg.org/uploads/1/3/1/0/131070160/kubalupepololivamiw.pdf
    • http://files.prevedelli.com/uploads/1/3/1/4/131453252/1c32c2b6.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/83595210199.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8832/files/38183802571.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9265/files/zaliguvigivogoluxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/23559587776.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34888362351.pdf
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/93446318102.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/72490002953.pdf
    • https://cdn.shopify.com/s/files/1/0432/7145/4883/files/spinal_arachnoiditis.pdf
    • https://cdn.shopify.com/s/files/1/0436/5425/0654/files/the_seven_chakras_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/8530/6782/files/37769924770.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_off00006263.bin
bcf7cc03352fecdb88c67600ba51f79cd5957507cb4384e38bcf421e707c18d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6263 5088 bytes
font_01_sfnt_off00007396.bin
7910f2358ff1488f6d3f6f1f23b439fa8faa8d3959931ed752add0eb9d5e1128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7396 14820 bytes

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