Malicious PDF — malware analysis report

Static analysis result for SHA-256 35010e5849b90352…

MALICIOUS

PDF

60.6 KB Created: 2020-08-23 04:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca1430955f8c0b6258e9acf3331fc1e4 SHA-1: 7beafaa85f3ae480317d4640467fcfde3e656d91 SHA-256: 35010e5849b903527907ed57df41584866e586f49738bc47de2a17581fd16b6e
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same URL. The PDF also contains a large number of links to external PDFs hosted on Shopify, likely as part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=cateter+venoso+central+definicion+pdf
    • http://files.vitalgateacupuncture.com/uploads/1/3/1/4/131438282/mijomadikuremo_lodovi_vujerogek.pdf
    • http://files.hafcafproductions.com/uploads/1/3/0/7/130776079/deramatozipe-zejuwutebekaxi-wukojip-gowofoguvi.pdf
    • http://files.woodcraftguildtasmaniainc.com/uploads/1/3/2/6/132680901/1463972.pdf
    • http://files.churchesofchrist.com/uploads/1/3/0/9/130969322/dinopivut.pdf
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/malayalam_christmas_songs_2017.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/blank_newspaper_template_printable.pdf
    • https://cdn.shopify.com/s/files/1/0462/8011/4325/files/pijujiduxaro.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1143/files/satujusomasejafakaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4802/files/shyne_bad_boyz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/whatsapp_business_app_for_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0440/6870/0310/files/18729663197.pdf
    • https://cdn.shopify.com/s/files/1/0436/8505/2566/files/descargar_calendario_lunar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/8800/1689/files/98671720670.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/kugazopip.pdf
    • https://cdn.shopify.com/s/files/1/0431/7714/8571/files/bolutiwas.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_off0000a573.bin
565e99d64711d6a9d59e14760bea8d85aa0dcd6973454cc7c2ff7caa52474b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA573 1604 bytes
font_01_sfnt_off0000ad95.bin
13bd0d623048eb22be08d4bfb43e4c893e69da51646f8868cc2f21b03ad245a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD95 5116 bytes
font_02_sfnt_off0000bf10.bin
900a3d31acd9ff95681c5a128e27a4f0d3750483e2ee9623c8a2395a2c690637		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF10 10736 bytes

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