Malicious PDF — malware analysis report

Static analysis result for SHA-256 596ea9c701c7bb03…

MALICIOUS

PDF

55.2 KB Created: 2020-08-06 18:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d92496e0fe384d98402763b32b343396 SHA-1: 7e23d567d0da57e041ce7fd69203688284bbcd3b SHA-256: 596ea9c701c7bb034e657f0a3c72def90617e75dfcfcc1ef007858ed77562bd8
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.cc/pify?keyword=skf+journal+bearing+pdf'. The document body, though heavily obfuscated, contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=skf+journal+bearing+pdf
    • http://files.ippconnect.com/uploads/1/3/1/4/131406977/9381830.pdf
    • http://files.phaselinedefense.com/uploads/1/3/0/7/130738752/40b776c6174b.pdf
    • http://files.candacelapan.com/uploads/1/3/1/3/131379510/0bb45e.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/jikufamubupader.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/fulikamozavomaxunabitiker.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/tediwipisuwapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3821/files/99206291597.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/sosatozamuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/70971483679.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/walmart_attendance_policy_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/mayon_volcano_pyroclastic_flow_hazard_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/13525293015.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/mesh_collider_unity.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/4078657037.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65817182127.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/wefapotexadepivekirijez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e53.bin
be8a4bd3f45a38ac07a259b367d4eac1ba51e4e285c52dae0a1d0eca5087878d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E53 5216 bytes
font_01_sfnt_off0000a00e.bin
cbba71206cbb13f69a50f13dec2cda2a8b963529b33be9803fbee5ce0c864bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA00E 9880 bytes
font_02_sfnt_off0000c1d9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D9 4324 bytes

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