Malicious PDF — malware analysis report

Static analysis result for SHA-256 05362d905bdbe31b…

MALICIOUS

PDF

56.4 KB Created: 2020-08-12 10:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5eee7cb15d5259a2e669029c0c8de40 SHA-1: 6d356b2ad4ecfdc3a49cf846b018051a921508de SHA-256: 05362d905bdbe31b98f874480b7f9aae7d7cf21119c96e510c1b2bffeca633f7
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector pointing to 'ttraff.com'. The presence of a 'download button' lure further supports a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=assertions+in+systemverilog+pdf
    • http://sotide.designsbykneeknee.com/uploads/1/3/1/3/131383314/821f9141b09.pdf
    • http://pagubef.flexgridapp.net/uploads/1/3/1/6/131637224/4044611.pdf
    • http://files.toymigos.com/uploads/1/3/1/8/131856381/61b8c1a.pdf
    • http://files.starwheelprinters.org/uploads/1/3/1/3/131384214/3830577.pdf
    • http://muxiwiju.reardenrealestate.com/uploads/1/3/2/3/132303382/siwimem-ruwirerinog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/99106142253.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/42652279033.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/xepuzeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/afforestation_and_deforestation.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/botomub.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/crossbow_by_weider.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/34467542454.pdf
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/49585433362.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/25988121970.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7948/files/github_pages_hosting.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/english_definite_and_indefinite_articles_exercises.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007af8.bin
06f61949e69b682fb1d4502ce6e916c356168ecf3bf20be46b34beab5c374cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF8 5304 bytes
font_01_sfnt_off00008cfc.bin
a2050a0886667efd40ed1f1ba49ba6828d79569f9a13d0bf7db957eef4703ace		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFC 15892 bytes
font_02_sfnt_off0000bef3.bin
2a726e4d8e078a4a4a6a0bed67b139344cab8167eb027720faf42c08020076b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF3 16120 bytes

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