Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5c49fe1d231b4d…

MALICIOUS

PDF

50.2 KB Created: 2020-08-12 16:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9c643b2ce73c06fb1b636bad7bd1838 SHA-1: f641109c94150393993afb064d132f5c623c99c3 SHA-256: 7b5c49fe1d231b4d4e11486affd3f5f4e5989a8798be0fe8b4f094c79817ee3c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=best+self+help+pdf'. This indicates a phishing or scam attempt disguised as helpful content. The document also features a link farm heuristic, suggesting an attempt to artificially inflate search engine rankings or distribute malicious links. While no scripts were extracted, the presence of multiple embedded URLs, including the malicious redirector, strongly suggests a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=best+self+help+pdf
    • http://fetiloxim.gapcg.org/uploads/1/3/1/3/131383791/3234561.pdf
    • http://files.millsites.com/uploads/1/3/2/7/132740457/a29be8d7e7.pdf
    • http://files.nutrition168inc.com/uploads/1/3/0/7/130775612/6d0a3f6.pdf
    • http://files.tuahu.tetokiharuru.com/uploads/1/3/1/6/131636692/613926.pdf
    • http://files.sennpen.com/uploads/1/3/2/6/132681951/fugivu_sogezefudazadi_bumagezowal_sotowe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/mamizupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/velovowowaxabutirekasap.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4213/files/logical_ability_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/poborezolenetun.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/situkujewetupufanezurido.pdf
    • https://cdn.shopify.com/s/files/1/0434/2169/6149/files/free_download_burda_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8371/files/74162927514.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/affichage_obligatoire_acm.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/9747291786.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0840/files/12768887128.pdf
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/limit_bilangan_kompleks.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_off000087f9.bin
11754ffa68d90fd218082f451f95cadea6f5221975591a320aedc7a270d39a01
pdf-font-stream PDF embedded font (sfnt) at offset 0x87F9 4872 bytes
font_01_sfnt_off00009891.bin
7f9e65d8226e1471aa343d06bcd5b8737dc77923579d8b19b8b6e7ec4ea1a6dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9891 10472 bytes