Malicious PDF — malware analysis report

Static analysis result for SHA-256 3634849d7391d32d…

MALICIOUS

PDF

53.7 KB Created: 2020-08-21 06:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13905705be884422fd189a0183e8071e SHA-1: 01b3cf91a6d5d832ed2aa1bcffb6b3f06d5e6f30 SHA-256: 3634849d7391d32d6d74b1fcbe5468c8960efa5f6a577a0199c30a53b0065e12
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a link to a known redirector (ttraff.ru). The document body contains this URL along with numerous other links hosted on Shopify, suggesting a link farm or content distribution strategy. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=accha+telugu+songs
    • http://files.dunbarband.org/uploads/1/3/1/3/131378953/99eb9a2de9fba.pdf
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/39147350226.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/newry_reporter_old_photos.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/bazaar_movie_song_ming_se.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0431/8914/1664/files/psychology_books_in_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/bakotuwudizodujobixag.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/fowuvidinugufibuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/bomewowelivomapoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/optimum_channel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0448/1269/7761/files/classroom_rules_flashcards_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/88462750493.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/84933418198.pdf
    • https://cdn.shopify.com/s/files/1/0437/8099/7269/files/simple_algorithm_examples_for_beginners.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e11.bin
72b2f077339da1f953200e58262c8e04cf28bf7a75d8f5b2f69ecf52a166ba98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 4788 bytes
font_01_sfnt_off00006e4c.bin
b61e94b68464796c6fefe0ecdaa592901f0ac79bffba61f8cf8ef33cf2285cc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4C 2760 bytes
font_02_sfnt_off00007a56.bin
bc3d201f0acc7e936d7b046d75fdc1780788ead0d469a160adcd12f4000eefea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A56 13956 bytes
font_03_sfnt_off0000a6a2.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A2 16204 bytes
font_04_sfnt_off0000bbcf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCF 4324 bytes

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