Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9cd09924aebdb9…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 17:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 182d04ca5b5625ab43d7182073e6bfb5 SHA-1: b3f17d0d7216d9b57fd18e1ff4d8a59542b24c2a SHA-256: cb9cd09924aebdb978f0f64447df22c0755214fe9f07a5ca06288b260b1e9196
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is identified as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic indicates these links point to a known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure related to a 'Baumatic washer dryer user guide', suggesting a social engineering pretext. The primary attack vector involves tricking the user into clicking the malicious link, leading them to a compromised site.

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/wix?keyword=baumatic+washer+dryer+user+guide
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/71609146320.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/21801257950.pdf
    • https://cdn.shopify.com/s/files/1/0447/7878/2869/files/95877626183.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/xujuxidukifajepifoviraj.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0734/files/bridal_mask_episode_1_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/fopijukosunexosowi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9518/5824/files/bujuba.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/mapa_carreteras_pais_vasco.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2119/files/algebraic_manipulation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/amplitude_demodulation_matlab_code_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/teachers_assistant_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/tiwexesej.pdf
    • https://cdn.shopify.com/s/files/1/0458/0687/8886/files/disney_descendants_3_full_movie_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0446/4757/9811/files/blanket_additional_insured_endorsement.pdf
    • https://static.usrfiles.com/ugd/e23fbb_8369a0dda11049128a55eb8a433664b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b54a9d3abc9d49a990bfec7a8d823e08.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_off000073ef.bin
633abf1e0a9ad4181bd8de2ab2df0eee3517264b5cc75747f6797d340fee95ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 5564 bytes
font_01_sfnt_off000086cb.bin
11c43a77e150e1f2d654c84a587f4c0bcfe7e53c5cb01a18eb99b68ba8503307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CB 10420 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.