Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe6972ffb9688d8…

MALICIOUS

PDF

46.3 KB Created: 2020-08-21 18:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4999970b1aa8cd2c3fd0e9873f7b5755 SHA-1: 7f184ae031c41ccd9880eddb63b3d0749893301c SHA-256: cbe6972ffb9688d863f47b3b292d25bb05edb6f11b55372a6a2bd71c14a11014
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=archinteriors+vol+36+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The document body, though heavily obfuscated, contains the malicious URL. The primary attack vector appears to be social engineering through a deceptive link within the PDF.

Heuristics 3

  • 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.
  • 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=archinteriors+vol+36+pdf
    • http://files.carpetcleanergrandrapids.com/uploads/1/3/1/4/131438761/9028960.pdf
    • http://files.eileefahnestock.com/uploads/1/3/2/7/132712206/fakatosoxebune.pdf
    • http://lutegumu.pauline-west.com/uploads/1/3/0/9/130969423/4850200.pdf
    • http://mafiv.guardianangels-animalsupport.co.uk/uploads/1/3/0/7/130739561/512830.pdf
    • http://files.austinsstudio.com/uploads/1/3/2/6/132682768/midazolapo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/christmas_songs_for_choirs.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/tivuxifabawupolivisinogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/book_for_synonyms_and_antonyms.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/97041300742.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/88548186186.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/nalepot.pdf
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/the_new_jersey_driver_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/64998283323.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9009713252.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005441.bin
b33e2c11248ad8fa3d520a906b29b15b4ad19c77b4cf940f7f2f8e0941fd8a46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5441 5188 bytes
font_01_sfnt_off000065d6.bin
53b0af05664dbda227e990708946322f757fb756d8b40fb3b1c0deeb75b69a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D6 10384 bytes
font_02_sfnt_off00008971.bin
4111154e076100b82c15878e86323e11c180b5a01e43f9a7d572491bd9fbd500		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8971 16068 bytes
font_03_sfnt_off00009e0c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E0C 4324 bytes

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