Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda660ccaab97a52…

MALICIOUS

PDF

42.3 KB Created: 2020-08-06 21:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 994876b477070d6615b3438f3fbb894e SHA-1: 659e3f6166e8cd42ef930510165f402eea81a61b SHA-256: fda660ccaab97a521749266a05a44140af27efc73af55158806f519de4697b67
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary URL, https://ttraff.ru/pify?keyword=aircraft+conceptual+design+raymer+pdf, is identified as a malicious redirector. The document body is heavily obfuscated but contains references to the redirector URL, suggesting the document's purpose is to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=aircraft+conceptual+design+raymer+pdf
    • http://files.trialinnovations.com/uploads/1/3/1/3/131383743/lisaponigowuxi.pdf
    • http://farigoxug.cfcspain.com/uploads/1/3/2/6/132682897/5ae79c90.pdf
    • http://files.grannylou.net/uploads/1/3/0/8/130814960/daxozabi_falegobara_samizosolobo_soxedifuja.pdf
    • http://files.dogsinks.com/uploads/1/3/1/4/131437041/2664419.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/38517927066.pdf
    • https://cdn.shopify.com/s/files/1/0429/3761/4499/files/pewibugodirukarolojoline.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/40620382100.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mikawewetekiwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/bristol_stool_chart_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/15162851450.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/43224397023.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/50856352947.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/94806022709.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/80677691595.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/computer_age_statistical_inference_efron.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/49534149295.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_off00006497.bin
7dfc905cc02d837ef26ebae4fc5a17c41cd421169915f76849926c89d308c330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5564 bytes
font_01_sfnt_off0000777d.bin
fa1e6723e24f63ca12c625d7041f15d21cafa36da2ef4b5b23fba04a07e4ea71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777D 10868 bytes

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