Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fe1abe8d858c29…

MALICIOUS

PDF

52.2 KB Created: 2020-08-25 16:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 956029e385a90fa0c095e0e9991d2a5d SHA-1: ea5b6b2e08d05480ef649fc6e27b1930f0747642 SHA-256: 12fe1abe8d858c29203dc79aa28f6ace1b85c22d14777dc40ca02a801e250a7e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, a common tactic for SEO link farms and phishing campaigns. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=gondang+batak+simalungun', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document's primary function appears to be directing users to potentially harmful external sites.

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.ru/pify?keyword=gondang+batak+simalungun
    • http://kiteko.fitcoresmartmoves.com/uploads/1/3/2/8/132815787/9df4c37db5a7.pdf
    • http://files.soolahhoops.com/uploads/1/3/2/6/132683088/devufafijet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/hak_kekayaan_intelektual_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0432/5215/4532/files/93834077052.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/42839118835.pdf
    • https://cdn.shopify.com/s/files/1/0452/0207/9893/files/platform_bed_with_storage_drawers_plans.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0794/files/pemogebagazelamufisipufet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/35890099843.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/kaxinenujegadewedogaseji.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5314/files/stonebwoy_ft_beenie_man_shuga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/35517048982.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/12436109481.pdf
    • https://cdn.shopify.com/s/files/1/0439/7550/8126/files/3472829876.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0496/files/kosilagone.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/36335896892.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_off000082bc.bin
9569a042e602a582c594f56294d7168cc4e185b0cc4d35dfed10a745bae5a6f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BC 5048 bytes
font_01_sfnt_off000093d6.bin
f731ab95a7391d8ee496a6c908f124f3cf12038242e642396c4333ca3d89dfa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D6 9984 bytes
font_02_sfnt_off0000b5ea.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EA 4324 bytes

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