Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f8655b58d672fff…

MALICIOUS

PDF

39.3 KB Created: 2020-08-04 17:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fdd93739e60b259495c933ddc3c9714 SHA-1: fb6c8d963f4c0fd5469c96ffc3c34ba2cde53a97 SHA-256: 1f8655b58d672fff8e00bf639b9fcae59260266fe3b298d871910d0b743c52d3
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=mass+of+light+lenten+gospel+acclamation+pdf, which is likely used to lure the user to a malicious site. The document body contains garbled text but also repeats the malicious URL and several benign Shopify URLs, suggesting a link farm or redirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=mass+of+light+lenten+gospel+acclamation+pdf In PDF document text
    • http://files.pyramusphotography.com/uploads/1/3/2/7/132710748/2953295.pdfIn PDF document text
    • http://files.barefootcustomknives.com/uploads/1/3/2/8/132814624/bixajolafo.pdfIn PDF document text
    • http://files.legacyyouthproject.org/uploads/1/3/1/3/131383949/nipezafivivedilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/nodejimowixowoleroga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5988/5733/files/67684490328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8603/5621/files/degejifijefosigexagasexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/kaxazekujula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/briggs_and_stratton_5hp_engine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8433/9613/files/35702411132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/majujifiwudokodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3591/7479/files/adobe_premiere_pro_bangla_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/japagepikadizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/from_inquiry_to_academic_writing_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/32129138548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/gapolezobemoviron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6483/3686/files/diwokumuxabubo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b3a.bin
d56edc6f6e9b5ac846ef563fe34817212cdab79c55dce0ae9166f4a1e320abfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3A 5480 bytes
font_01_sfnt_off00006dc6.bin
06fccc9f52229e104c8bc19de2819dbfce75a89d4d09581085d2869d641fb037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC6 10088 bytes

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