Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da17133b9aebebb…

MALICIOUS

PDF

58.3 KB Created: 2020-08-07 23:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 234cd151320559569108413380516989 SHA-1: 749e2664387e0e77c8de452953be91fde4984cab SHA-256: 8da17133b9aebebba9e80f8a13a4389777843ef826a28507988fb3679100d212
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The presence of a link farm heuristic indicates the PDF is designed to host numerous external links, likely for SEO poisoning or to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=cashflow+101+game+cards+pdf
    • http://files.beblessedwellness.com/uploads/1/3/2/6/132681985/f23d5983046a48f.pdf
    • http://files.fromchristodad.com/uploads/1/3/1/1/131164260/1969183.pdf
    • http://pumuka.aexist.nl/uploads/1/3/0/7/130739826/cde6a6c82f7858.pdf
    • http://files.pictonresource.co.nz/uploads/1/3/1/4/131437750/vajifiwedini_solutifuwikabof_gosen_modukipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/similar_shapes_volume.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/98666579810.pdf
    • https://cdn.shopify.com/s/files/1/0440/1440/3742/files/furefizek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/16412532264.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/fozixafavibologijumatot.pdf
    • https://cdn.shopify.com/s/files/1/0431/7803/3303/files/tuvivizivunisawun.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/90810334522.pdf
    • https://cdn.shopify.com/s/files/1/0433/2791/4152/files/mysql_commands_in_linux.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/70345127973.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/93485546433.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1866/files/1_to_1000_numbers_in_english_words.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/15194814378.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_off0000a2ba.bin
36cbb761edbd6d02d3a2430fd341b4a44b784c16a1eb4ed62dd1027a55f5b9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BA 5760 bytes
font_01_sfnt_off0000b647.bin
1fbac71170bc0883368a113b4d298fa686b95f8569b56d32618ca4a46afe60c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB647 11420 bytes

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