Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c098b32fd46c67…

MALICIOUS

PDF

51.5 KB Created: 2020-08-12 10:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 945e2bacbc8e9d77fb472ef757ff2ff7 SHA-1: 7e044c59eeee8a58ea407a0575aec9b61231b314 SHA-256: 18c098b32fd46c67b7303db00766209dcbe2f427a5c3fc69114fe64fe751fdbb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically advertising a 'biofertilizers pdf free download'. The primary malicious URL identified is ttraff.com, which is flagged as a redirector. While the document body is heavily obfuscated, the presence of numerous external links and the critical heuristic firings strongly indicate a phishing or content-luring attempt, likely to distribute further malware or lead to credential harvesting.

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.com/pify?keyword=biofertilizers+pdf+free+download
    • http://files.gerigventer.com/uploads/1/3/2/7/132710784/b2086.pdf
    • http://files.narinesookram.com/uploads/1/3/2/7/132712011/d21172485d1.pdf
    • http://files.one-common-ground.com/uploads/1/3/2/6/132681558/zakajaniveraz_nofubuza_dumenudexebil.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/buvofukosatibikesas.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/68145100923.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9041/files/piazzolla_libertango_piano_trio.pdf
    • https://cdn.shopify.com/s/files/1/0436/1145/5645/files/44041023212.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/xexigozujerabadadepopam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/xifigewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3941/6732/files/fivura.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/battlefields_of_the_mind_joyce_meyer.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/kosiwaderukeku.pdf
    • https://cdn.shopify.com/s/files/1/0435/7550/9155/files/meputipotesovebumuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonamanasalusowalu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007609.bin
0727529401fe802ed9d02ac4b3bed84f53da9d0a5838f1dab7fe2f7579417e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7609 1696 bytes
font_01_sfnt_off00007e33.bin
a47e1da6ed3e4a2a6878a717aa7af0b2542c249c5dc4f27ed00763df888d471b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E33 5012 bytes
font_02_sfnt_off00008f60.bin
edb96cadb6c9691176c65867777239ea5cf675f487ce55574d835f8910d7708d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 10244 bytes
font_03_sfnt_off0000b254.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB254 4324 bytes

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