Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee366ee2a7468ba…

MALICIOUS

PDF

50.2 KB Created: 2020-08-09 09:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e642dc5e00879b1f48a9211ce89579bf SHA-1: 3c197f1f7483903dd493aaeb7aed0711e1a5bfb2 SHA-256: 4ee366ee2a7468ba21d1cac673918ff50ee0fc3bb2097e11a7bfad0e52f0c007
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=behringer+xr12+manual+pdf, which is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of a large number of external PDF links suggests a link farm for SEO poisoning or to distribute further malicious 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=behringer+xr12+manual+pdf
    • http://files.callstevekapur.com/uploads/1/3/0/9/130970016/aa83c5.pdf
    • http://files.ay-kay.com/uploads/1/3/1/3/131382955/d13bffa.pdf
    • http://files.berberraftingadventures.com/uploads/1/3/1/6/131637649/4e93f08331ece8.pdf
    • http://files.yoursaltsource.com/uploads/1/3/0/7/130739399/wekos-genoz-xibekafu-gegararij.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/97524395397.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/free_books_download_links.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/52287424516.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1049/files/valenatujakifi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4918/7493/files/daihatsu_charade_g100_workshop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/gomaki.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/behavioral_research_a_conceptual_approach.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/cormyr_the_tearing_of_the_weave.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/anticoagulant_oraux_direct.pdf
    • https://cdn.shopify.com/s/files/1/0434/4312/6438/files/belkin_n300.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007827.bin
0f8db16a1daac26acdd2bf5cb8ca705b4d3f059757ae6e444bb333f271af7763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7827 5268 bytes
font_01_sfnt_off000089e0.bin
08af0652609f93868ad222736716768585e8176ddfed4c20b78776f8f8a64385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E0 10688 bytes
font_02_sfnt_off0000ae0b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0B 4324 bytes

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