Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf22f81391b28276…

MALICIOUS

PDF

185.3 KB Created: 2020-08-22 13:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4d2a100a41e80012fb42a045926bca3 SHA-1: 0750de8844d5f360dd9ffda84440813b5d46440e SHA-256: bf22f81391b28276ee7c4b5eaf3774a85a6e43679ada1842cd7d6dad12d54544
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=action+song+malayalam+free'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient to infer a likely attack pattern of delivering a secondary payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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=action+song+malayalam+free
    • http://kemat.anarchydieseltuning.net/uploads/1/3/1/4/131406381/c13fa.pdf
    • http://nusuwaxid.cowboycollars.com/uploads/1/3/1/8/131856190/122258d.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/knights_of_pen_and_paper_2_crafting.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2523/files/zobokixeduvodekegometat.pdf
    • https://cdn.shopify.com/s/files/1/0434/4371/6262/files/mawixowiduriweriganegumes.pdf
    • https://cdn.shopify.com/s/files/1/0435/2278/5444/files/jacobson_cephalometry.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/86837766844.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/dofotisunopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/adjective_order_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/83361147921.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/aristteles._tica__nicmaco.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6177/files/learning_english_conversation_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/le_bilinguisme__madagascar.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/20867916540.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/zufiri.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027634.bin
84ae3ac25adbb1d7c134c4c99b738a6723aa7facdc7f7e7d77882cd03a3e12dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x27634 5292 bytes
font_01_sfnt_off0002880e.bin
969cead32241dfd1e8b8153abe9b7c465fe1515a8b3e38771ab3c43b70d8c4c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x2880E 2788 bytes
font_02_sfnt_off00029332.bin
277e18e56bc16d6c51321b045f20ebcfcb51b0b518af1b09a4bad6d2a9506b54
pdf-font-stream PDF embedded font (sfnt) at offset 0x29332 15240 bytes
font_03_sfnt_off0002c233.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C233 16204 bytes