Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a45b10ad229b617…

MALICIOUS

PDF

43.0 KB Created: 2020-08-16 15:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3c03019d7915b05d05fefe4ffb973c5 SHA-1: 1da2e6470702bc1c90164f59e1892a39e04158dc SHA-256: 7a45b10ad229b617ba72f96716affe66850be58abec235e860f2adfb53ce9256
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

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.ru/pify?keyword=nutritional+benefit+of+breadfruit+pdf
    • http://zusodegub.sportsimagephoto.com/uploads/1/3/1/3/131381533/84b4b35f312.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/convexity_and_duration.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/69072727733.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/cancionero_infantil_ukelele.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/60946831495.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/96324697924.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/gosekiwepagidopofosux.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/words_bee_gees_piano.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8222/files/18222312424.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2560/files/26842891123.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/vovugigifejadekidevumoge.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/32124341676.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/vemokasixuwuti.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/lokud.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/vokaruz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2240/8087/files/smiley_face_outline.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b19.bin
b38b31e972d1865a750aa47b124ad38b3289274dce18e89846654de74476d143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B19 4964 bytes
font_01_sfnt_off00007c08.bin
4e203811ce2442cb494e0a032d1b8394635ecd2203fe8d973dfe159cb37c679e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C08 10264 bytes

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