Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1ad2c528c23834…

MALICIOUS

PDF

51.7 KB Created: 2020-08-23 06:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44126b1ed55048e9c977d65b9fa955bf SHA-1: 805b6fb4c2aefddbacd7b390bee09ce01595d64f SHA-256: 6f1ad2c528c23834afb75905b2bd26ad4dd7c302dcb14c97b4bd7b9631091225
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to drive traffic to potentially harmful content. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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/pify?keyword=beyonce+coachella+performance
    • http://dixiz.duniaamir.com/uploads/1/3/1/4/131438019/kavibilazefi.pdf
    • http://files.forgiftmenottrading.com/uploads/1/3/0/9/130969984/d6b701.pdf
    • http://files.thechurchinindianapolis.net/uploads/1/3/1/4/131483201/d910e8.pdf
    • http://kuruw.joannetchen.com/uploads/1/3/1/4/131408008/xewewimu-kobuvur-dosekav-purun.pdf
    • http://gurisepi.informedoiler.com/uploads/1/3/1/3/131379552/tujivazilitotu_vituka_kuwijebuli_ninojapipaveg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/18067894282.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7978/files/indiana_state_abbreviation.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/mizidebip.pdf
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/novirusijilijuwaju.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/72457109701.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/39672168255.pdf
    • https://cdn.shopify.com/s/files/1/0434/5951/0424/files/28316067955.pdf
    • https://cdn.shopify.com/s/files/1/0435/7410/0127/files/nexazafalag.pdf
    • https://cdn.shopify.com/s/files/1/0447/3192/4629/files/ashoka_movie_songs_mr_jatt.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/maths_questions_for_class_6.pdf
    • https://cdn.shopify.com/s/files/1/0434/4676/3677/files/18209127214.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f95.bin
8035f87150f8df8d32307fd3c3e6f16964b64b0a92b3e7979c861cbf9d3a3bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F95 4888 bytes
font_01_sfnt_off00008ffd.bin
19152999f4206c7ef415f64b523c48b92c1e551880fce910ebc127f9128b0ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFD 10492 bytes
font_02_sfnt_off0000b3d5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D5 4324 bytes

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