Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb86bbe0957a46b…

MALICIOUS

PDF

45.7 KB Created: 2020-08-10 10:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26fbdf3912a517493110335a5b76619d SHA-1: 46afebd18ec9a2bd7c677f72c880f26f29b2c67a SHA-256: 6cb86bbe0957a46bff7ee9b001d7a12ff8dd286a6406aa35825c735b9550cbaf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits a PDF link farm heuristic, with numerous links to PDFs hosted on Shopify and other domains. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=bodmas+questions+for+class+10+pdf', reinforcing the redirector finding. This suggests the document's primary purpose is to redirect users to malicious infrastructure.

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=bodmas+questions+for+class+10+pdf
    • http://files.ibunson.com/uploads/1/3/0/7/130775435/xexajekabadumerijiko.pdf
    • http://mameja.avimehta.com/uploads/1/3/0/7/130775934/40a7e202c22607.pdf
    • http://files.apple-itchyfeet.com/uploads/1/3/1/3/131383434/gukukexogizowi.pdf
    • http://files.charlie-myers.com/uploads/1/3/1/3/131383456/tageliratuju_tipenubexok_tikiremeluvo_silepo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/fisebidadigufowipapekax.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/interview_questions_and_answers_on_data_structures_and_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/77085595116.pdf
    • https://cdn.shopify.com/s/files/1/0428/2567/9015/files/xorola.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/37803288914.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/55795117465.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8912/files/49781334115.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/pipowonokolexibatalabape.pdf
    • https://cdn.shopify.com/s/files/1/0429/9046/9283/files/8127628191.pdf
    • https://cdn.shopify.com/s/files/1/0440/3612/8933/files/dejipevufuromil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/the_pocket_handbook_of_image_processing_algorithms_in_c.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_off0000641d.bin
41cc5126f461e337f253ce74d8be1e44ac39cb383e13e818fa476e204916ac2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641D 5552 bytes
font_01_sfnt_off000076e5.bin
749486b3d070f8ed13cae5d34f9635cec6fc0e7e3c2c759347edf544de58faab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E5 10644 bytes
font_02_sfnt_off00009b16.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B16 4324 bytes

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