Malicious PDF — malware analysis report

Static analysis result for SHA-256 d001ce0c27ba7c01…

MALICIOUS

PDF

57.0 KB Created: 2020-08-05 04:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38312cb6388efcdf6d6b346c804f66d6 SHA-1: 94b2742cc4e09ac261d98b1f296d968ee3f89183 SHA-256: d001ce0c27ba7c01cb7c1473b12a48dae40856989c6b32b96e652f5b5b9e256a
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including one to a known malicious redirector at `ttraff.com`. The document body, though malformed, also contains this URL. This indicates the primary purpose is to redirect users to malicious content, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wb?keyword=la%20biologie%20marine%20pdf
    • http://jebimuwo.aquafuelresearch.com/uploads/1/3/0/7/130740051/pinubefuv_pogubezejalij_ketagivum_velud.pdf
    • http://files.scarekrogames.com/uploads/1/3/0/8/130814644/zogojupumiso.pdf
    • http://files.djsk8.com/uploads/1/3/0/9/130969985/e6de39f01754.pdf
    • http://files.ajconsultingcompany.com/uploads/1/3/1/3/131379590/7846606.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/36557118454.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/47963464710.pdf
    • https://cdn.shopify.com/s/files/1/0439/6960/9886/files/how_to_wrap_text_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/58961774684.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/62791865535.pdf
    • https://cdn.shopify.com/s/files/1/0432/8679/0304/files/pibikemutubimunoxifemox.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/zekiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/wupuzikuviwubav.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7663/files/megufamajojavakugem.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/xivuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/bojiduridebovezunufemoxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/diana_walstad_ecology_of_the_planted_aquarium_free_download.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_off00009bae.bin
3eea3de36c88d7ff28f221b53411c79a3e46a7e33c309e498a9acd684ac420ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAE 5264 bytes
font_01_sfnt_off0000ad7d.bin
2275aaad483b8ff1b9fa3f76e192fa2620596e8e63472a0e3cda76e433f4b960
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7D 12752 bytes