Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bf31945f622852d…

MALICIOUS

PDF

39.2 KB Created: 2020-08-23 05:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 153f1bd91477832ead41d5003180ec5a SHA-1: 2511f7a3762074f8112ebc1e3eaf5afbdf7c66c4 SHA-256: 4bf31945f622852d7ece6c7fb9df1fec582121c49fe4d301da28969ba2ee8e99
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and several other URLs hosted on Shopify and other domains, suggesting a link farm or redirection scheme. The primary malicious URL is https://ttraff.ru/pify?keyword=bossa+nova+dance+performance, which is likely used to funnel users to malicious content.

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=bossa+nova+dance+performance
    • http://jofuzinus.rosecitythunderbirds.org/uploads/1/3/2/7/132740805/7a770af744.pdf
    • http://files.kmstudioart.com/uploads/1/3/0/9/130969183/9188029.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/51957362779.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/japanese_animation_songs.pdf
    • https://cdn.shopify.com/s/files/1/0452/5889/9618/files/33663463597.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7394/files/campbell_biology_11th_edition_test_bank_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/donell_jones_where_i_wanna_be_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/8627852003.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/87582787825.pdf
    • https://cdn.shopify.com/s/files/1/0430/7448/6421/files/tegolavemeruza.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/sodium_hydroxide_liquid_msds_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/characteristics_of_africana_womanism.pdf
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/fovuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/66154139044.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_off00004f94.bin
04e13e01cbdfa493db8b139ba171953a8992b2286bfa66dfb7d166539a5763a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F94 5376 bytes
font_01_sfnt_off000061c9.bin
bdbcd89eea02dde6814fb5a10326594ec27cec85fb83ca0cf684c40df0ea3d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 4168 bytes
font_02_sfnt_off00006f07.bin
e3dee89edbc0ade28bd9b514d49fcfb97a1c79257d095d78b3728a6744da74b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F07 9580 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.