Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df3e0f2b371bb9b…

MALICIOUS

PDF

53.9 KB Created: 2020-08-07 21:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b3ee7e9bf291128d6c7710fcf9a03bc SHA-1: 7a156e8eecaf92fef692418afe908ab38a5e64f5 SHA-256: 1df3e0f2b371bb9b797514d2ab792c9eba1b65a3c9d48d324fc89fe97ead6205
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=carbon+dating+examples+pdf', reinforcing the lure. The primary attack pattern involves social engineering through deceptive links within the PDF.

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=carbon+dating+examples+pdf
    • http://files.thedancerseye.com/uploads/1/3/0/8/130874593/latadukiterolur-pawenojokixe.pdf
    • http://files.gailmadeitdesigns.com/uploads/1/3/1/4/131484328/nejalelax_gikexatutekok_fevopuxim_dezamujunepap.pdf
    • http://rusiz.farleydesigns.net/uploads/1/3/1/6/131607600/bikitame.pdf
    • http://files.impactremaps.co.uk/uploads/1/3/1/8/131856071/rirutimiwu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/22895328726.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1066/files/sezosivadelabubarodusura.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/nutusiduwuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/xilopojafegerotavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/46433711976.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8248/files/18217623694.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/prefix_suffix_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007118.bin
1af6b93a7f3819db5bb1b6b16092aa2fa3493b4bc390c1e65019efe393887be1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7118 5380 bytes
font_01_sfnt_off00008348.bin
a2490a9f29cfee84f8025753caa62772ec7a3c25d46506bf278a4bcf5636c6d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8348 10516 bytes
font_02_sfnt_off0000a775.bin
b10e7a0583bf6b216a5471aeed10f14210f1dda3adb60ac5169fcb38ba12e60c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA775 16060 bytes
font_03_sfnt_off0000bc05.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC05 4324 bytes

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