Malicious PDF — malware analysis report

Static analysis result for SHA-256 6642fced5deecbcd…

MALICIOUS

PDF

50.5 KB Created: 2020-08-18 18:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb467d0cfba84256af98dbbbd48b4a74 SHA-1: b1ba27c8fbcf76a194d67ce4a849065b7a75cb79 SHA-256: 6642fced5deecbcd124f77a9961046243fc8a4e608b1988e2728e8847b1fe321
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Barbie movies free in tamil' and the malicious URL, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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=barbie+movies+free++in+tamil
    • http://nikigepaf.irva.studio/uploads/1/3/2/6/132682883/cc01aae9110fa2d.pdf
    • http://files.dubayhomeinspections.com/uploads/1/3/0/8/130815017/rotew_sutuluzupuri_durimiva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2110/5309/files/fepabanosivotememebuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/cambiar_de_a_word_trackid_sp_006.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/antenatal_care_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewugokujugiwiburonanas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/10717055264.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/florida_projectile_point_identification_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0682/8441/files/bible_verses_for_healing_and_strength.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/6884914115.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/5_rights_of_medication_administration.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/21117436215.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0985/files/1567935971.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/zadizevasoroz.pdf
    • https://cdn.shopify.com/s/files/1/0452/7046/6722/files/anxiolytic_and_hypnotic_drugs.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_off0000874c.bin
02ff2d28a289aa3ca0e323f37b9b83909b93d1ce7d309d68bab532d2c3d41f20
pdf-font-stream PDF embedded font (sfnt) at offset 0x874C 5164 bytes
font_01_sfnt_off000098ce.bin
66b365f99ecd910f10cf7f0928e52078af7f3573ec9d84de15d2b42cffe5f51b
pdf-font-stream PDF embedded font (sfnt) at offset 0x98CE 10612 bytes