Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5992e4aeb03a33…

MALICIOUS

PDF

118.5 KB Created: 2020-08-13 02:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5433a54db9a7ddbe2263266cc9017ea SHA-1: 82c3a0159c55d290c4042bffda8258497ac98358 SHA-256: fa5992e4aeb03a333cf78d28fc39af45a3ab75b9b6ef695144c277eb386f38ec
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=approaches+to+international+compensation+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'international compensation' and the URL itself, suggesting a lure to a malicious site. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO poisoning or traffic redirection.

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.ru/pify?keyword=approaches+to+international+compensation+pdf
    • http://files.venturesxmeech.net/uploads/1/3/1/4/131407164/buxedewubut_popekelupujipu_xamolabagikemaw.pdf
    • http://files.carolynspearromance.com/uploads/1/3/1/8/131856991/gadokapupe.pdf
    • http://rexerosuj.scvbodyapplicators.com/uploads/1/3/0/7/130738797/lebezowijorole.pdf
    • http://files.downforacure.org/uploads/1/3/2/6/132681558/5102631.pdf
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/27388873351.pdf
    • https://cdn.shopify.com/s/files/1/0433/2129/5003/files/wawebivozapijevodedemer.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/24531243415.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/silelipoxejapubisapaxufop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/kosimifunagosirojaki.pdf
    • https://cdn.shopify.com/s/files/1/0436/6086/9785/files/23170063498.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/7996/files/slow_dancing_in_a_burning_room_chords.pdf
    • https://cdn.shopify.com/s/files/1/0450/2798/3510/files/chemical_reaction_engineering_levenspiel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/canciones_infantiles_en_ingles_y_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/49128618457.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5458/files/categorical_data_analysis_by_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8068/files/zodasemazenexe.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_off00018914.bin
e074fbe435f0cd4c96f2f66542376a0f79648421aed8860bb948bb89af6e177e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18914 5384 bytes
font_01_sfnt_off00019b2d.bin
87ada78b73e3f72c41112fade323d72e109206ef06deed8cae623cf68e1f1676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19B2D 15604 bytes

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