Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb24c741c3ce1798…

MALICIOUS

PDF

38.0 KB Created: 2020-08-01 23:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df2627db0999be3eafcf056cab848cfe SHA-1: 02cc438f13455b10e8e25d7c374c84c38483cfb1 SHA-256: bb24c741c3ce17985d1738b92c70239bd7e6533f84b630f089a35b908c537e2b
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=fairy+tail+episode+141+english+dubbed', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Fairy tail episode 141 english dubbed', suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links hosted on cdn.shopify.com indicates a link farm strategy, likely to improve SEO for malicious content.

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=fairy+tail+episode+141+english+dubbed
    • http://files.dealsrgreat.com/uploads/1/3/1/8/131871569/df5716e3fe394.pdf
    • http://files.cerealalchemist.com/uploads/1/3/1/3/131379590/saxopafizu.pdf
    • http://files.greyriderfordixiecom.com/uploads/1/3/0/7/130738933/5030808.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/jilavuwivivurudala.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/38113501313.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/lafugijeranew.pdf
    • https://cdn.shopify.com/s/files/1/0439/5764/9566/files/jogufoke.pdf
    • https://cdn.shopify.com/s/files/1/0432/6909/5590/files/muzadileliworexupawifetos.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/67753874115.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/tebawujivusinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/xirebav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/49467104278.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b49.bin
1563fecf640a2d38abd725cccb631c2207e970ddabe302ad90fcfa21fe5ccbe3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B49 3560 bytes
font_01_sfnt_off000057f1.bin
8f047687f537fb32177a104de9d5f7c9e693e47ec26339ba48d38a238a4031cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x57F1 5560 bytes
font_02_sfnt_off00006adc.bin
6c25c7d3ef21bb31ea31d8debb915b88b2eff88042e1412042a9effb4ccd9d3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADC 9360 bytes