Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf3fb61d46cb1ce…

MALICIOUS

PDF

93.6 KB Created: 2020-08-04 22:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f27a71aebf4da8368f7985b03a2c74a0 SHA-1: db20dcbd1c2a81fb0ce4fa03d156cf35b339942c SHA-256: dbf3fb61d46cb1ce014d1624961b13e4b3dfde83bd32f9edd45b17c6fea17c62
152 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text that appears to be a lure for users searching for 'Bhajan lyrics in kannada pdf'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates that the primary purpose of this PDF is to redirect users to malicious infrastructure. The ML classifier also flagged this PDF with high confidence.

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=bhajan+lyrics+in+kannada+pdf
    • http://files.lifeinthetumbleweeds.com/uploads/1/3/0/8/130873728/2065266.pdf
    • http://files.joegrabowski.com/uploads/1/3/1/8/131857465/bikesito.pdf
    • http://gudotu.henriettagee.com/uploads/1/3/1/4/131408027/234d4cc6da6be.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/kufowoxifuwesiful.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/lotekava.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8727/files/91562123735.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/muforamuna.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/cgeit_training.pdf
    • https://cdn.shopify.com/s/files/1/0437/7739/2794/files/danivesov.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/wofamonurijefoseloloped.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/41208634307.pdf
    • https://cdn.shopify.com/s/files/1/0440/4540/2277/files/quality_control_in_hematology_laboratory.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/96163239266.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/43891187222.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/28226817315.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/vegetubozagenelobip.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/6123549409.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_off00011198.bin
34292f842c6194975a6d13ea42c06cac50debd4e6aa7fcc58b929a1a2986d2a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11198 5012 bytes
font_01_sfnt_off00012287.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12287 1800 bytes
font_02_sfnt_off00012b15.bin
945205ac810ce5bd98222d29a5ce167bfa5b012e9e814624cc2d027e5357876d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B15 15248 bytes
font_03_sfnt_off00015a12.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A12 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.