Malicious PDF — malware analysis report

Static analysis result for SHA-256 841726bc7adc4e7f…

MALICIOUS

PDF

50.3 KB Created: 2020-08-06 08:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f1293ade398591db5325613fbbade51 SHA-1: 3d30094618d1fa3e05bbb809b8d0aeedcf752637 SHA-256: 841726bc7adc4e7f228759b2f9193935c99435bcdbd424ffec06f62278c2d097
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, indicating the primary lure. 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.ru/pify?keyword=arabesque+no+1+debussy+pdf
    • http://files.pegasuscreationscandlecandyshop.com/uploads/1/3/1/3/131380213/gapifegaketeduto.pdf
    • http://files.mrragersblog.com/uploads/1/3/2/7/132740249/9ad178faee0c841.pdf
    • http://xunevat.mcossfinishes.com/uploads/1/3/1/3/131398091/7926965.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/33188622870.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1175/files/android_studio_tutorial_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/autocad_architecture_2020_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/lipid_profile_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/blender_2._79_shortcuts.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/13403192392.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/believer_alto_sax_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/48695046611.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0536/files/zuxexes.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8927/files/pafegijurenira.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/suzoxexuxinezafavov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2524/4053/files/architecture_design_portfolio.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/tiduj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • 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_off000083b2.bin
12512b7496d6b9e496610d271776c31ad371664741ded6e50261c8f9792ce7f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x83B2 5412 bytes
font_01_sfnt_off0000962c.bin
ccad7e0cf6e5a54c20e4d0af07e161f96f027f6abce909b23ab9d1b70acb0aac
pdf-font-stream PDF embedded font (sfnt) at offset 0x962C 11088 bytes