Malicious PDF — malware analysis report

Static analysis result for SHA-256 687cc63997f9e723…

MALICIOUS

PDF

45.0 KB Created: 2020-08-27 23:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 727365a39804b6cd7746fff0fbb8f781 SHA-1: 4d7c75912b3f4f73fe58475fb91cf8bf0cd931fb SHA-256: 687cc63997f9e7235f1826cd7ba2cd794cde074a3232fc53f77db0af96756c56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=universal+remote+control+urc+r6+codes`. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise its malicious nature. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to drive traffic to malicious sites.

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=universal+remote+control+urc+r6+codes
    • http://dosirefut.slcollectibles.com/uploads/1/3/2/7/132712109/5532342.pdf
    • http://files.nssla.org/uploads/1/3/1/3/131398008/lenirojigasap_gikorepur_gizawebakid_wedif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/nibof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/toyota_pickup_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/dejevaviwadefe.pdf
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/o_que__aprendizagem_significativa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/40740283447.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/basic_english_grammar_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5512/files/charmglow_patio_heater_parts_thermocouple.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/rigilap.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/cities_in_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/dilesawavekupulexapipegel.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_off00006794.bin
bd7adec9464961ef8ee74cad1f598a3a08973e0f15b90474980f0a395fe1e30a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 5288 bytes
font_01_sfnt_off0000797a.bin
67ab8666bb259645d94f0e7df2c4df501962f98b58475dbc0fbd9367fd817784
pdf-font-stream PDF embedded font (sfnt) at offset 0x797A 14784 bytes