Malicious PDF — malware analysis report

Static analysis result for SHA-256 678f3d6b816b1031…

MALICIOUS

PDF

40.4 KB Created: 2020-08-24 16:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27a1e396b51392cdde33fd2b07b08365 SHA-1: 29b8a5a20fe3027ab237e17d824ebdcd038c8297 SHA-256: 678f3d6b816b103147ef4e1ab9ec07959dffbbdb160158e56d49d1a95f81996e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=funny+baby+whatsapp+status+video'. The document body also contains this URL, suggesting an attempt to drive traffic to potentially malicious content or phishing sites. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic. No scripts were extracted, but the overall structure and link analysis point to a social engineering attack.

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=funny+baby+whatsapp+status+video
    • http://files.hopeshouseworks.ca/uploads/1/3/1/4/131437313/kotesitanivuboz.pdf
    • http://files.schramselfdefenseproducts.com/uploads/1/3/1/4/131407423/8688637.pdf
    • http://jiwovumot.scifilms.co.nz/uploads/1/3/0/8/130873826/ca7044b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0449/4534/2619/files/past_simple_story_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/jojelesazedilifef.pdf
    • https://cdn.shopify.com/s/files/1/0437/3354/9205/files/29494579763.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/biguzuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/xuvosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/26678134709.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/77473444151.pdf
    • https://cdn.shopify.com/s/files/1/0462/1772/4057/files/57335146855.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/45583995734.pdf
    • https://cdn.shopify.com/s/files/1/0436/2017/1936/files/bohemian_rhapsody_piano_easy.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/tipos_de_anemia_em_caes.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_off000052bd.bin
576eb1e03ba11585137774ce1c5dc47c1c7e5327ffc6c7375882499591bb8b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BD 5152 bytes
font_01_sfnt_off00006453.bin
456a513a8f72685d0eb9c4764384105bd11008c27b10be7184d708125923dab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6453 10160 bytes
font_02_sfnt_off000086c4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86C4 4324 bytes

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