Malicious PDF — malware analysis report

Static analysis result for SHA-256 633080c334d6fdeb…

MALICIOUS

PDF

49.9 KB Created: 2020-08-23 05:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c857f858fddffccccbf7673530e0b360 SHA-1: dedc0c0d8f63f63d79b71d3d5971a499d96ef8f0 SHA-256: 633080c334d6fdebd7b873f53cd9e7f28001af77d68de2917c33f2132726fec6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to benign Shopify URLs, indicates a potential link farm or SEO manipulation tactic to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=hubspot+marketing+automation+platform
    • http://files.bh365project.com/uploads/1/3/0/7/130740262/bopakiwimokag-lagibaniz-belipev-ditedutiluzopu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7424/7063/files/esl_business_english_conversation.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/maths_formulas_ssc.pdf
    • https://cdn.shopify.com/s/files/1/0438/1274/9469/files/66789475610.pdf
    • https://cdn.shopify.com/s/files/1/0437/1900/0229/files/periodontitis_agresif_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4294/files/vatatewawoworus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/nimekabep.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/stihl_wood_boss_028_av.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/tic_tac_toe_code_in_cpp.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8912/files/10770202870.pdf
    • https://cdn.shopify.com/s/files/1/0439/2134/2619/files/57217745109.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/nogovemixilefalenegojega.pdf
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/xirafar.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000768b.bin
6fd197743f3baeed4cf92699acc2884623db5d1674432c1efa63e2b4a010fa69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768B 5268 bytes
font_01_sfnt_off00008850.bin
7cb8c84242ac6569b447640a88806453dec90ea32f0389f332c484917da03ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8850 10444 bytes
font_02_sfnt_off0000ac02.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC02 4324 bytes

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