Malicious PDF — malware analysis report

Static analysis result for SHA-256 704c42c363e3ec56…

MALICIOUS

PDF

46.8 KB Created: 2020-08-21 21:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b6b8180100e926684f7f8fa3a4103eb SHA-1: 1d87f4683397af966c463f0db5801cb903ac2767 SHA-256: 704c42c363e3ec565d4c0def8d5b16bceb6873046ac47b8ce0252dcefee08054
154 Risk Score

Malware Insights

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

The PDF contains a lure for an 'Android phone tracker free online' which, upon inspection, redirects to a malicious URL. The document body is heavily obfuscated but contains the malicious URL and numerous other links, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=android+phone+tracker+free+online
    • http://files.hollytheater.com/uploads/1/3/1/4/131453251/4029980.pdf
    • http://kifuzepo.en.guacamaya.info/uploads/1/3/0/8/130874422/movipop.pdf
    • http://nelot.excelpodiatryclinic.com/uploads/1/3/0/7/130775045/2865921.pdf
    • http://files.biodiversitymarine.com/uploads/1/3/2/8/132814791/0a0d5.pdf
    • http://files.zulal.org/uploads/1/3/1/4/131453206/jufot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2754/5755/files/is_flood_damage_reported_on_carfax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/symbolic_interaction_theory_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/pneumopathie_d_inhalation_traitement.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/tovezotusuvujakudubenem.pdf
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/1st_gen_cummins_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0438/3490/0637/files/ragowuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/allergenen_liste.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/82950324802.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/nugagebetenofutu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5688/files/nokilolemaxatoraz.pdf
    • https://cdn.shopify.com/s/files/1/0461/8253/1225/files/job_interview_questions_and_answers_sales_consultant.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/51261694451.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_off000072c2.bin
ffc367dd7bc758534e1c210743f48035eacd5fadaf7c0d96ed63411cb5b2ac84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C2 5116 bytes
font_01_sfnt_off0000841e.bin
59e618624c1b4c6c51ca5847d0255387589f9f7939853a77e404e4a98c6cd760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841E 13260 bytes

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