Malicious PDF — malware analysis report

Static analysis result for SHA-256 7902f9f82c3f40a3…

MALICIOUS

PDF

45.2 KB Created: 2020-08-06 15:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2695a27f6aa477bac63a0423e7b25b35 SHA-1: 84541b65300e7cf913ad5bb6265f518ab2c7e852 SHA-256: 7902f9f82c3f40a3f979143d7550a1e9891cfe4bf602f6074d9c43424fec6861
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including a primary malicious redirector at "https://ttraff.com/pify?keyword=cervical+pain+exercise+pdf". The document's structure suggests it is part of a link farm designed to improve SEO for malicious content, likely to lure unsuspecting users. The ML classifier strongly indicated maliciousness, supporting the presence of these deceptive links.

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=cervical+pain+exercise+pdf
    • http://zagovik.caperecovery.co.uk/uploads/1/3/1/3/131378950/3950318.pdf
    • http://files.doggiestylezinc.com/uploads/1/3/1/4/131408970/disodovuzivaxopubi.pdf
    • http://files.millard-and-kleinsteuber-histories.com/uploads/1/3/0/7/130775892/vobozukibisusi_wusiro_titexawibap_zanipozezupafen.pdf
    • http://files.kathleenmercury.com/uploads/1/3/0/9/130969242/439069.pdf
    • http://powiminux.glynelwyn.com/uploads/1/3/0/7/130775085/7018765.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/trait_complet_de_l_anatomie_de_l_homme.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1919/files/photoshop_instructions_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/ase_a4_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/jaxebinixenevo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/81669760589.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/zafutuga.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/chlamydia_pneumoniae.pdf
    • https://cdn.shopify.com/s/files/1/0432/2633/3351/files/jopujasilemawajujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/6304709753.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/fatikepikojivigobukoseni.pdf
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/buvijesi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0440/9494/files/geometric_progression_problems_for_class_11.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000688f.bin
5886d3005580652820e510275e444e4738064e5554cae3396008391baeb81ec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688F 4900 bytes
font_01_sfnt_off0000793d.bin
568384e38ed621632727329fc2e53a95d0f7739f0f7e9e51716aecaa16480a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793D 9500 bytes
font_02_sfnt_off000099ba.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99BA 4324 bytes

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