Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dac26100912746…

MALICIOUS

PDF

44.8 KB Created: 2020-08-08 19:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d149095af3529b2f05aee28951e937e6 SHA-1: bb8f97f06b576e5a98e0453b512cd4a7d8b43b55 SHA-256: 63dac261009127463e5fdd9e4bf7a9f858199dcc91b01220f69a906d569471a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=archaeological+resources+protection+act+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking malicious links. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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=archaeological+resources+protection+act+pdf
    • http://files.thebearstfriendsfurevershow.com/uploads/1/3/1/3/131380871/91c2b5b559.pdf
    • http://files.businessbcs.com/uploads/1/3/2/7/132740343/e9c81eaa854.pdf
    • http://wutoso.dentalequipmentonlinestore.com/uploads/1/3/1/6/131637814/luvekoju.pdf
    • http://files.newtongrangegala.org/uploads/1/3/1/4/131437941/8601804.pdf
    • http://files.willishallherald.org/uploads/1/3/1/0/131071063/pakuje_nevatobulifuzu_wafopesawubud_lorinimuvefitu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/6717/4040/files/aerodynamics_car_design.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/legato_carpet_tile.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/kiduderobiwiji.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/55586520646.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/ecotourism_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/quality_control_interview_questions_and_answers_in_pharma.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/2752590866.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/31081854036.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/85357906889.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/20395810365.pdf
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/wubotojusid.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000704a.bin
02bfab566966fe9f32ae8f4f30d60104d6ba7fd7bc17e1bdc54c933f68183619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704A 5408 bytes
font_01_sfnt_off000082ab.bin
28c9160930186b6d0bdf7efabffe1f7cb246ef1af07d5f19d0656190ee8cdcd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AB 10196 bytes

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