Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f77effdba3983e5…

MALICIOUS

PDF

54.7 KB Created: 2020-08-10 04:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f153bab0580311908cedda037da63f24 SHA-1: f1cefa8ce48f584f347315f6c6316ed9d45e90e6 SHA-256: 0f77effdba3983e5935e748928d57b313d83d3b5970eb365c3fb54b8a8fa3420
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.com/pify?keyword=ecological+modernization+theory+pdf', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the malicious redirector indicate an attempt to lead the user to a harmful destination.

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=ecological+modernization+theory+pdf
    • http://files.melindahetzel.com/uploads/1/3/2/3/132303077/vidaderevi-rozotegineve-wediniruki-nitirosuru.pdf
    • http://files.priestessbling.com/uploads/1/3/0/8/130814340/3914470.pdf
    • http://files.iwfgeorgia.org/uploads/1/3/1/4/131455883/dofez.pdf
    • http://files.interwovenproductions.jojospinks.com/uploads/1/3/2/8/132814465/9014109.pdf
    • http://files.strivetothrivewellness.com/uploads/1/3/1/4/131438313/99d9e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/kodo_skin_scroll.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/76029145068.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/69997158181.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/game_theory_economics.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1702/files/center_absolute_div.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/puluda.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/94358728235.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/technical_analysis_explained_fifth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/sevemizazodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/konica_minolta_bizhub_c458_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/tupefe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097b8.bin
3286953d666c088202370cc157f2e37dc3d061454abf8324ac05ed5e27cee876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97B8 5500 bytes
font_01_sfnt_off0000aa59.bin
9931281b34f8324e6ff9ae351f607f1c0b8c05a3e170b606e5504323369c7822		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA59 10272 bytes

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