Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aabd0400078e6ec…

MALICIOUS

PDF

43.5 KB Created: 2020-08-02 10:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9782c48fa195f26d3ae740bd1dab4e71 SHA-1: 28462d7e90f138a13485a931dffb826d736e25ec SHA-256: 6aabd0400078e6ec656d509163f490ebe898b875b8dbc1d6f2ad4eb84f62b467
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm, and PDF_MALICIOUS_REDIRECTOR_LINK confirms a link to known malicious infrastructure. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware delivery.

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.cc/pify?keyword=d%2526+d+money+converter
    • http://files.andrewbrimhall.com/uploads/1/3/0/7/130775400/5154452.pdf
    • http://files.smellsisee.com/uploads/1/3/1/4/131438474/womaxapofisan_davos.pdf
    • http://files.starmembership.org/uploads/1/3/1/3/131384335/lanog_suniwasidulof_lopulav_soturaxaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/transfer_files_from_mac_to_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/command_and_conquer_red_alert_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0433/9571/1132/files/7159713597.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8357326041.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/99939585954.pdf
    • https://cdn.shopify.com/s/files/1/0433/4505/1797/files/fijetub.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/sirewuxevimojazapuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/zimizefokojaxuxadavot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/73502605421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datofugilasififuko.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/likafefigerip.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/95648967559.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/zupatevazemud.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/puxemaxarogizepilaresa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/lamewitavomuzel.pdf
    • https://medlineplus.gov/vitamind.html
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ed.bin
33019dbc7dce146be9396d22118e5eda0a3a9187904cdfdddb9ce8b8b2194f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64ED 3484 bytes
font_01_sfnt_off00007059.bin
4572e974ab6566a7151bb5a58535d1abdecd86d517592cfba06faa66ba002a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7059 10384 bytes
font_02_sfnt_off000093a0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 4324 bytes

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