Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f2d1ae83284cbd…

MALICIOUS

PDF

37.4 KB Created: 2020-08-28 14:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2eed12136f749267939c43e829a997af SHA-1: 949df1f5e347846c2af4c4912b75f2f7dec73a02 SHA-256: a5f2d1ae83284cbd7099bfc46e3aa1385071d58b2a201b3994060f1d6c71718c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves luring the user to a malicious site via these links.

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.com/pify?keyword=chemical+manipulators+elite+dangerous
    • http://files.advance-scientific.net/uploads/1/3/1/4/131483097/nevonuxuf_susajelasaw_magarigusalaveg_pidazi.pdf
    • http://mupew.rochellesteder.com/uploads/1/3/2/7/132740873/9115499.pdf
    • http://files.shonkalay.com/uploads/1/3/0/7/130739601/buvifopolafap-fajezuxujovuwu.pdf
    • http://tonow.oldschoolsailing.com/uploads/1/3/1/6/131606295/zonijitekojo_xasonitamet_gilapuzenilekev_muraf.pdf
    • http://files.carsesus.org/uploads/1/3/1/3/131381612/629c865.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/75436495135.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/knowledge_transfer_template_xls.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/holt_science_and_technology_earth_science.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/41934738174.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/x11_forwarding_putty.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8131/files/sustainability_report_sgx_requirement.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3701/files/aide_mmoire_d_lectronique_analogique_et_numrique.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6026/files/letter_of_recommendation_template_for_employer.pdf
    • https://cdn.shopify.com/s/files/1/0433/9410/5509/files/33366507938.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/65513548447.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/
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/6551354844

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000470b.bin
4fbe4f6aa74ac90f32f36f70982c5084eeaa991b5afbd8e55cebd8e7aa97498b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x470B 5392 bytes
font_01_sfnt_off00005928.bin
c4c8ae387d65079ae06e0c8dcad6787772537a4e68a00ef784b6e3ec1bdf1157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5928 9828 bytes
font_02_sfnt_off00007a75.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 4324 bytes

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