Malicious PDF — malware analysis report

Static analysis result for SHA-256 288d3b427af202db…

MALICIOUS

PDF

42.0 KB Created: 2020-08-03 20:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7662c35d3a16b66f7faad35d72eb434 SHA-1: 4294475a85b0933fe90b76dd1f234b486ffe8fd0 SHA-256: 288d3b427af202db356d1d50aceb217f85c09d1db5dab75ec07c010a04e43f45
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL being https://ttraff.ru/pify?keyword=interventional+radiology+cardiology+pdf. This heuristic firing, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to harmful content. The document body itself is heavily obfuscated but contains the same URLs, reinforcing the attack pattern.

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.ru/pify?keyword=interventional+radiology+cardiology+pdf
    • http://files.farmersandfamiliesforlivingston.com/uploads/1/3/0/7/130739146/fc651e56c2d2.pdf
    • http://files.herryjarchitects.com/uploads/1/3/1/0/131070291/9cee3.pdf
    • http://files.pattyschroeder.com/uploads/1/3/1/1/131164383/ca135b1e73.pdf
    • http://files.wildwombinwellness.com/uploads/1/3/0/7/130776592/zudofezijozu-sokarit.pdf
    • http://files.readytoexhaleworkshops.com/uploads/1/3/1/3/131379099/396d163.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/puntos_de_partida_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/49584534185.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/82204372940.pdf
    • https://cdn.shopify.com/s/files/1/0431/1977/1799/files/energi_biomassa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5895/files/mosasemavoxavaton.pdf
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/tibid.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/jerodawoxapaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/xilarowawuna.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/arms_warrior_pvp_talents.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/brian_kopps_1_60_alliance_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/tegegopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/94747077527.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_off0000665a.bin
9adb36f07564a219cf634f3697278915bc139d1acd0d6e143397b74ce19b9ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665A 5244 bytes
font_01_sfnt_off00007858.bin
57f329c129dede35e5beab5b330dd2656970fc1088d81e74cdb24b60cfd7cea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7858 10084 bytes

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