Malicious PDF — malware analysis report

Static analysis result for SHA-256 036a811283a52a3e…

MALICIOUS

PDF

40.6 KB Created: 2020-08-17 14:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24f6908317a436bc0ab1a067ceb486e3 SHA-1: 5698ab271a5e4b177cd4fbccfb28cf34b4b01e8a SHA-256: 036a811283a52a3e4baff6b6672d97acc290841e8f9f902a1e797139732ecf82
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious or unknown domains, suggesting a link farm or redirector strategy. One prominent URL, 'https://ttraff.ru/pify?keyword=facebook+android+app+minimum+requirements', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to Facebook app requirements, likely serving as a lure to disguise the malicious intent of directing users to potentially harmful websites.

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=facebook+android+app+minimum+requirements
    • http://files.vibertview.net/uploads/1/3/1/6/131606366/roduvugawolavu-kemizuz-nuwoxa.pdf
    • http://zinilu.bydivineappointmentthe5ps.com/uploads/1/3/0/7/130738524/figevebozaliti_musuj.pdf
    • http://files.familylawyerminnesota.com/uploads/1/3/1/6/131607712/jubigi_vomikewupinoz.pdf
    • http://files.invictainstitute.com/uploads/1/3/1/3/131379591/jufapeniwovuka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/85721497304.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/fonimotenabubobawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/algebraic_geometry_hartshorne.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/69069789561.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/81000633056.pdf
    • https://cdn.shopify.com/s/files/1/0430/7563/3306/files/class_11_biology_syllabus_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/can_t_hurt_me_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/p90x3_fitness_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/pathfinder_unchained_monk.pdf
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/abbotsford_weather_report_today.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/mannich_reaction.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_off0000602e.bin
eed23344c66a821a7d51a0d879257e692b99028e3c497c3c922d5136119323e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602E 5472 bytes
font_01_sfnt_off000072a4.bin
1329c98527a4fb3ccaf8e384c635eba7806a313c9531e52861863154da46c99e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A4 10376 bytes

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