Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffba8dcfc2740a3…

MALICIOUS

PDF

45.3 KB Created: 2020-08-29 23:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93cc95722d9626e0bc46d82c8a41dff6 SHA-1: a7763fc3f2f224e7cce683e92a478a107d19ce58 SHA-256: 0ffba8dcfc2740a3a766790a3c807254fabfbfb635b93c0a3dc9dcb0058d79c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.ru. This suggests the document is designed to redirect users to malicious infrastructure, potentially for phishing or malware distribution. The presence of many Shopify URLs, some flagged as benign, indicates a link farm strategy. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/wix?keyword=narrative+of+the+life+of+frederick+douglass+an+american+slave+shmoop
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/0936/6427/files/material_box_shadow.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/zafogov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8311/files/tizalilugarimebin.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/99197718728.pdf
    • https://cdn.shopify.com/s/files/1/0440/6149/1352/files/usb_xstaf_explorer.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/togonofaxopubopozirus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/35256070325.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/rukunupurusariz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/perap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/8321227459.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/senior_accountant_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/7498684599.pdf
    • https://cdn.shopify.com/s/files/1/0428/8013/9423/files/complete_symmetrical_patterns_worksheet_ks2.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/heartworm_society_guidelines_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/zunekarodupifegawez.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_off00006506.bin
bfcc75366aac3b25ba402f79ff6de3c6e9e4fe5ac7b6c3b31950697a9ac1bea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 5544 bytes
font_01_sfnt_off000077c2.bin
d1df24bef10059ededdc5cff4a06217b87dd0e51daed0c1e3c26ac3bf2800d5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C2 9872 bytes
font_02_sfnt_off0000998f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x998F 4324 bytes

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