Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5342421980562e…

MALICIOUS

PDF

37.0 KB Created: 2020-08-15 06:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4485100d4dc85ef715090ff83a7c2722 SHA-1: 742521a641dd38a75d0fc96ac4d1fe4dc5edb028 SHA-256: 5f5342421980562e97b98eddc476977389263bc51eedf93a45271a1b75bebb2e
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 obfuscated, includes text related to a weather report and the malicious URL, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious destination and potentially for SEO manipulation. No scripts were extracted, but the primary malicious activity appears to be directing users to the ttraff.ru domain.

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=goregaon+weather+report
    • http://files.lgbtwalco.org/uploads/1/3/1/4/131406861/337489.pdf
    • http://files.federalwayseniorcenter.org/uploads/1/3/1/8/131871602/5698098.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2582/3904/files/feeding_broiler_chickens.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/pusunuzesalok.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9560/files/the_bible_in_arabic_sidney_griffith.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/gucci_mane_off_the_leash.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/76942507.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/vutonejuvegevotujuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4458/6140/files/domeruvofawudara.pdf
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/76897366732.pdf
    • https://cdn.shopify.com/s/files/1/0432/3409/9362/files/wazewitikux.pdf
    • https://cdn.shopify.com/s/files/1/0433/8568/4124/files/african_ontology.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/nerokezubilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2616/9503/files/mezzo_forte_uncut.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_off000053ae.bin
88728ca7bc411cb3de50567d8b64d75bc5cec2b06ff973fd8daf860ea5412a74
pdf-font-stream PDF embedded font (sfnt) at offset 0x53AE 4996 bytes
font_01_sfnt_off000064bf.bin
bf07f1f73ef315e70df1c10c1fecd1715e6eee2d90575dcea7cd0d5d6298846c
pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 10152 bytes