Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae13d14ceb7dffbf…

MALICIOUS

PDF

49.9 KB Created: 2020-08-18 23:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35f20a0ccebbbb43775abf8bcd4f9e8d SHA-1: 3c5358b02e1754e5a309a77bedd0c85dd051e4d3 SHA-256: ae13d14ceb7dffbf77442b2700e117a498728bf5f1c22bfb3272c0039e3b1533
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links. One of these links, 'https://ttraff.ru/pify?keyword=lacerta+lepida+care+sheet', points to known malicious redirector infrastructure. The document body also contains this URL and numerous other links to PDFs hosted on Shopify and other domains, suggesting a link farm or SEO manipulation tactic. The primary intent appears to be directing users to potentially harmful content.

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=lacerta+lepida+care+sheet
    • http://files.krasnoevents.com/uploads/1/3/1/4/131406780/pemekojitofarim_fivezifem.pdf
    • http://files.damnearcabins.com/uploads/1/3/1/4/131483083/4956039.pdf
    • http://files.cuestacollegerodeo.com/uploads/1/3/1/4/131483550/f518ae417.pdf
    • http://vovuwopu.marianwilde.com/uploads/1/3/2/6/132695550/gitoganofumisax-xasum.pdf
    • http://files.xinjunzhang.com/uploads/1/3/1/4/131438161/937f5328d0c0.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/5295397421.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4178/files/ramagizesatewipeto.pdf
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/abdominal_examination_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0430/7786/1527/files/kixumokebusokuluzak.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/kozosimazezagapanavuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/43519062008.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/92315859162.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/83886984869.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/tabadigabejigomadasegowi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0613/0337/files/8129876175.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/anna_karenina_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/95490210872.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_off00008614.bin
852dc0f2b7db9665bdbaa1e26c04a68b8004f2a04c32e5f7d820c393b129cafc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8614 5104 bytes
font_01_sfnt_off0000975e.bin
5506dbeb9cdd4ebf23b4e07c25a8f66034d22085cca7b68349bbe328c944a391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x975E 10420 bytes

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