Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a183d7e40cb32e…

MALICIOUS

PDF

67.2 KB Created: 2020-08-24 14:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1311974515644271d0599c29cf666a1 SHA-1: bd5bcc8d1b0cc2774ba9894afa84f588d04bb012 SHA-256: 22a183d7e40cb32e34f4270c3c9cd38f22ab2800a1b82ff89e422e2db629101c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=template+primitive+type+c%2523`. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=template+primitive+type+c%2523
    • http://belajeze.caringinc.net/uploads/1/3/1/3/131398252/xefujipisogupun_kasabiv.pdf
    • http://molidis.natashamartel.com/uploads/1/3/1/1/131164424/niwozu-lerefufal.pdf
    • http://dekalo.nsmt.org/uploads/1/3/0/7/130775350/8298279.pdf
    • http://xarodar.fnqfestivalcubano.com/uploads/1/3/1/6/131637814/ed5dc493cbc22a.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/rakuvawu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/65976663223.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/nitaniw.pdf
    • https://cdn.shopify.com/s/files/1/0440/0100/1630/files/9989718432.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/ranajatilezizoworumorex.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/boxozitazutakegu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/glossary_of_history_terms.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/wabutevidime.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/tedaritebar.pdf
    • https://cdn.shopify.com/s/files/1/0437/7110/1346/files/pipe_it_up_clean_version.pdf
    • https://cdn.shopify.com/s/files/1/0448/8540/9959/files/rilijototekeva.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/zivizudabifiranu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/36237278596.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_off0000bae0.bin
aeab95fe479263b68c151dbbcacd495efdc2c3fe4c4c2e69fd4220f3eed6d23d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE0 5012 bytes
font_01_sfnt_off0000cbe2.bin
eae0440b1333207bd4f93c06c2aa6d27e2fa6f0ab431fdba7a94d66c6e1cd0f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE2 16560 bytes

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