Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc57ba1aecc2122…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 22:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f41b26398a62b5722b026f51c02e10f SHA-1: 9238bd94e5fb4f0251ff82ee5290da8637799987 SHA-256: fbc57ba1aecc21223ef8a38e4501305cf55618d56426f8226286f31c6d3c58a8
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One of these links, 'https://ttraff.cc/pify?keyword=adenoiditis+adalah+pdf', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure users to malicious sites. The presence of a large number of external PDF links further supports this 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.cc/pify?keyword=adenoiditis+adalah+pdf
    • http://maganed.gasperandassociates.com/uploads/1/3/0/8/130814017/d0d114a.pdf
    • http://juwelo.ozzyhell.com/uploads/1/3/1/1/131163635/76293556f2d.pdf
    • http://files.hypnomads.com/uploads/1/3/0/7/130740049/909062.pdf
    • http://files.southshieldsmma.com/uploads/1/3/2/7/132740670/2094040.pdf
    • http://files.finessegarments.com/uploads/1/3/1/1/131164520/xariwubix.pdf
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/vopikixukuwidozamisenat.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/besaxewokafad.pdf
    • https://cdn.shopify.com/s/files/1/0433/4904/9494/files/past_simple_regular_verbs_worksheets_elementary.pdf
    • https://cdn.shopify.com/s/files/1/0434/3850/6146/files/35560030328.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/dupinigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/electrical_engineering_mcq_question_answer.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/nepupexojobufadazexur.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/business_development_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/91702786576.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/bipukavagakun.pdf
    • https://cdn.shopify.com/s/files/1/0446/7815/2345/files/ink_master_season_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/arduino_pro_micro_pinout.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_off00006792.bin
d1a315a5982e99c5d113f292613094d29c8c4ad6bfc0b42772fd07ebeb15042b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6792 5020 bytes
font_01_sfnt_off000078a7.bin
9efb5e6cab5065e07f4a2d5ab70d594df0346baa03f25b477dbcc63cbf721249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A7 10208 bytes

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