Malicious PDF — malware analysis report

Static analysis result for SHA-256 22003311ca1d2aa2…

MALICIOUS

PDF

40.6 KB Created: 2020-08-25 08:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f596c368b0c6b5970ec817365c90e42a SHA-1: 1bc179760e083a9139384588f3ea1acf14d4f583 SHA-256: 22003311ca1d2aa248242c30e4854e6dcfab2b2a37c18b69a4421efa1709065a
152 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to a known malicious redirector, specifically 'https://ttraff.ru/pify?keyword=messenger+lite++uptodown+old+version'. This redirector is likely used to deliver a secondary payload or lead the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'Messenger lite' and the redirector URL, suggesting a social engineering lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination.

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=messenger+lite++uptodown+old+version
    • http://files.womanofgodministries.net/uploads/1/3/0/7/130740391/sizeginevezub_guvurireken_semarabe_tilejoforevo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8911/5801/files/13852548432.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1959/files/stratigraphy_and_paleontology.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/rujajelawubofepufulub.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1487/files/newalopen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0433/9377/7827/files/wubisuwos.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/mewomawusopebagusovagi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/boxigapibex.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/49462742460.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/my_best_self_journal.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/88545532950.pdf
    • https://cdn.shopify.com/s/files/1/0429/1418/5372/files/skype_for_windows_7._0._0._102.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/optek_control_4000.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dd1.bin
5f69c61daf523f32beedb0be96b5bfd59c85b30f11cc2c2e7c2f238e207ed64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD1 5076 bytes
font_01_sfnt_off00006f3f.bin
2f72b1d3fd12fd3ddfaa78ce513430ab7e0d6fb7228b6efc625996caf064484a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 11928 bytes

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