Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1403201334c913…

MALICIOUS

PDF

50.8 KB Created: 2020-10-04 06:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 210309ab8c639059eea3ec53477bc0df SHA-1: 3a1ab366fd01a606b9bbd80f80a7ac9282f7e04e SHA-256: 2b1403201334c91391cdce15ddccbb53328566998c2bb3050be027944d6d1873
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect users to malicious content. No scripts were extracted, limiting the analysis of further stages.

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://cctraff.ru/pify?keyword=glencoe+health+2007+pdf
    • http://files.shademotorkits.com/uploads/1/3/1/4/131437680/9838626.pdf
    • http://tumebuba.nhsofdav.com/uploads/1/3/1/4/131406841/7530e7be82fe8b.pdf
    • http://files.stoneranchpta.org/uploads/1/3/1/8/131856574/5962515.pdf
    • http://sokax.exploretheworldtours.com/uploads/1/3/2/6/132696558/vabironigisumaxufiz.pdf
    • http://files.paintingsbyhelen.com/uploads/1/3/0/7/130776639/8023296.pdf
    • http://votuwubi.pbjfewspotacrepoas.com/uploads/1/3/1/3/131381761/mepodu.pdf
    • http://files.psnwrug.com/uploads/1/3/1/4/131438843/lozuvimonaduma.pdf
    • http://koreva.wisefooltheater.com/uploads/1/3/1/4/131410090/582246.pdf
    • http://files.compassionate-language.com/uploads/1/3/1/6/131637140/6735032.pdf
    • http://files.stpetersarkley.com/uploads/1/3/0/7/130776142/mubalun.pdf
    • http://taxes.n3vem.com/uploads/1/3/0/8/130813059/tovezolegi.pdf
    • http://tixis.khloekares.com/uploads/1/3/1/6/131637409/4253464.pdf
    • http://files.columbuscountyfarmersmarket.com/uploads/1/3/0/7/130739895/2125370.pdf
    • https://uploads.strikinglycdn.com/files/7920da43-8dc0-4135-8a61-cfaea102f704/naziwobagobavujuzin.pdf
    • https://uploads.strikinglycdn.com/files/2d94a109-ff10-4969-ae65-99da8484df72/54020204925.pdf
    • https://uploads.strikinglycdn.com/files/dce82d52-4ada-4113-b562-073993b215b1/30283448621.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_off000069de.bin
c01ce4be444dd7660c95ebbf8323f713dc86dd38544e1d8408deb719d7564ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DE 1708 bytes
font_01_sfnt_off0000724e.bin
2c80389712b4b7f83c4c757d7434bf361dd11a19218897f58fb1c44ab3a461b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 5092 bytes
font_02_sfnt_off0000839b.bin
d786b8d4005b3adb5f91a4f7ee5e436ed4806a9036719a481fe9d42720934c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x839B 2048 bytes
font_03_sfnt_off00008c81.bin
6550c5865daefe00fc43c3bbceceba1ca92d09e4b639abb09708720efcab7f0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C81 10260 bytes
font_04_sfnt_off0000af83.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF83 4324 bytes

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