Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcb117ce535ec6b…

MALICIOUS

PDF

40.2 KB Created: 2020-08-14 00:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbfe0598baac87fd9c33ccb689b49860 SHA-1: d4bd8f8a7f9d6cb90a64fa7c6678ba469b4925da SHA-256: 9bcb117ce535ec6b8ba876174bb5c4103ee1e50c142a9a566ed2278e20884a5f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems

This PDF document is classified as malicious due to its extensive use of embedded links. A critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=apache+car+game'. Additionally, the document functions as a link farm, hosting numerous links to PDFs on Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, preventing further analysis of its specific intent beyond link distribution.

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=apache+car+game
    • http://files.drunkpirateprintshop.com/uploads/1/3/1/4/131438013/bijetoteruro.pdf
    • http://files.jarkkopartanen.com/uploads/1/3/0/7/130776077/1154524.pdf
    • http://revamaxa.solanocanyon.org/uploads/1/3/1/6/131636725/sisuvavopizabarise.pdf
    • http://files.newgracech.org/uploads/1/3/1/1/131163578/sojomuved.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/94527538489.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/zofetujozetisikowut.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/free_alphabetical_order_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/8723/2166/files/duxiwijumizixopegawis.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/33390293133.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/xerosavesavawesarew.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/lupowigenupitepusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/intentional_talk_math.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/fuvumux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/50121182812.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/7407839005.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/juvebewejijikamegamevo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/exercice_pour_apprendre_a_lire.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_off0000616b.bin
8cfd875f25e089529ed32ba3f18311ee7e53ef78054b977e1ff3c8463e4afbc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 5124 bytes
font_01_sfnt_off000072b6.bin
05283e56e2bc595ca725204d176981fd2330b76cdcda7fb296c9271e26dbd7c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B6 9800 bytes

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