Malicious PDF — malware analysis report

Static analysis result for SHA-256 2905361b7ea35f74…

MALICIOUS

PDF

49.2 KB Created: 2020-09-03 02:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1725b71f757f5116edbbc9ef7314d8b4 SHA-1: ce0bb0bfc241e2dec9e6a45a73020ee6dff49a28 SHA-256: 2905361b7ea35f74b8da31ac1ff5f7be7bcf80da46427e0e709e817e833362d6
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.com' which is associated with malicious activity. The document body, though heavily obfuscated, contains text suggesting a lure for a novel download, which aligns with the redirector's keyword. The presence of many external PDF links, some pointing to Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, and the primary malicious functionality appears to be the redirection to the malicious URL.

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=alif+novel+episode+5+pdf+free
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/tozukokisirap.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/properties_of_composite_materials.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/gidutodurixeba.pdf
    • https://static.usrfiles.com/ugd/594ae5_57ccbec45c544855979b78b14757e1ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_672df19a5cb5463dae8a535bd7d428c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b4006b263a44d7881db2fe21a027e61.pdf
    • https://static.usrfiles.com/ugd/b8c837_a76236dc6014450881049cea60c599ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_60555049390642529381efb17e044f90.pdf
    • https://cdn.shopify.com/s/files/1/0437/2594/7029/files/employee_evaluation_templates_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/5816/6949/files/automatic_car_parking_system_using_plc.pdf
    • https://cdn.shopify.com/s/files/1/0435/9939/7027/files/weight_loss_exercise_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/wisamixelugawopoboko.pdf
    • https://cdn.shopify.com/s/files/1/0439/6092/6366/files/vuguvagirozazikep.pdf
    • https://cdn.shopify.com/s/files/1/0446/8133/0841/files/punctuation_worksheets_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0433/7860/6229/files/64149472006.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_off00006100.bin
c784c30fc96423ea6bce9285c67d3e43132f9bc7ab315d7d148954e0f1d7ec61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 4704 bytes
font_01_sfnt_off00007109.bin
0fc5123bbec1b9c7b97b1f8c8d1cf06ed83b057cb71fa09f74167771eaa9b853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 10272 bytes
font_02_sfnt_off0000942d.bin
bf082e207b5bc53417c42f326db31bd9cff9b646d45df60ddc5d10082f24ee11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x942D 16184 bytes
font_03_sfnt_off0000a950.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA950 4324 bytes

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