Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd17d36efed38995…

MALICIOUS

PDF

43.4 KB Created: 2020-08-17 06:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d55bda77bad3de967faa686b458971ec SHA-1: d4dd632c1914a0c7167c149aab87bf5f31ce9c97 SHA-256: fd17d36efed38995e3e6c7a9918370e15bd4650dd7bee535f1bdaa21c84627b3
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it's a redirector link to a known malicious domain. It also functions as a link farm, hosting numerous other PDFs, likely to obscure the malicious redirector. The embedded URL 'https://ttraff.cc/pify?keyword=motu+patlu+cartoon+video++mp4' is the primary indicator of malicious intent, likely serving as a lure or initial stage for further compromise.

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=motu+patlu+cartoon+video++mp4
    • http://sebiteki.calvarylutherancs.org/uploads/1/3/0/7/130739017/ruxijigipefin_megegituwurigo_xatumiv_kulovojuxo.pdf
    • http://toforelu.catholicartistconnection.com/uploads/1/3/1/6/131636612/9087441.pdf
    • http://jiperi.donnawickham.com/uploads/1/3/1/6/131606027/zinawiruresomivas.pdf
    • http://files.dreadzilla.com/uploads/1/3/1/3/131380058/pojumi-sujanowufi-fobuf-kujefe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/32799308183.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/jalujefinebubaxaxuxelasag.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/10109725017.pdf
    • https://cdn.shopify.com/s/files/1/0430/4997/5961/files/apollo_1500_gate_opener_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/gobofawujarev.pdf
    • https://cdn.shopify.com/s/files/1/0431/5316/2389/files/25439405382.pdf
    • https://cdn.shopify.com/s/files/1/0434/4351/9638/files/assistive_easy_touch_apk.pdf
    • https://cdn.shopify.com/s/files/1/0447/1400/0538/files/clockworkmod_recovery_zip.pdf
    • https://cdn.shopify.com/s/files/1/0451/1848/8741/files/bradford_white_water_heater_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/autonomic_nervous_system_pharmacology.pdf
    • https://cdn.shopify.com/s/files/1/0434/4161/9100/files/xoveteledoxamexagomeze.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_off000063f5.bin
bb9152e754b9aa0c3d41a7dddd89e9cbb16bb5b2909d4e7977a1da84dc1bf21f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 5192 bytes
font_01_sfnt_off00007599.bin
ddce6dcf2cf2302a722ddf772e3af7add4bb340e432dfe049db2c86b6a3ef027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7599 14048 bytes

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