Malicious PDF — malware analysis report

Static analysis result for SHA-256 7575b6f8fbef0889…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 00:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63465b5d97bd34b577d9ec88183d3e4a SHA-1: d2a67fd927b3ebc2b4b7da2764422360cc8f4faf SHA-256: 7575b6f8fbef0889d8c7fec5a8c7e9a1e7e753d1e0b1ab8cf020cd307aa12366
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate PDF files hosted on Shopify. However, the primary link redirects to a known malicious domain, ttraff.ru, indicating a phishing or redirection scheme. The ML classifier strongly supports the malicious verdict, and the presence of numerous external links suggests an attempt to drive traffic to malicious infrastructure.

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=bartholinitis+adalah+pdf
    • http://files.borobot.org/uploads/1/3/2/7/132740270/1c32dfc010beac.pdf
    • http://files.aperitivoperformancegroup.net/uploads/1/3/1/3/131398419/fixoxoveloxa.pdf
    • http://files.algonquinparkcanoetrips.com/uploads/1/3/1/3/131379277/2854621.pdf
    • http://files.europeanbonsaipottercollective.com/uploads/1/3/1/6/131637362/zovujaxalevol_romop.pdf
    • http://files.adolfostreeservice.com/uploads/1/3/1/4/131454238/8ad5896.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/19933345700.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/ludifabeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/pengertian_akuntansi_syariah.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/49692989326.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/1878143531.pdf
    • https://cdn.shopify.com/s/files/1/0431/6790/8004/files/31805330296.pdf
    • https://cdn.shopify.com/s/files/1/0432/2692/3172/files/tableau_public_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/levidalujidetiwutoz.pdf
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/kafka_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/sawodipututuzodopusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7473/9607/files/componentes_organicos_del_suelo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/masuruxevelagetuv.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_off0000706b.bin
8a38017430c702fbd86e263939cf58a6ac540a1732f5d2ed9ace893cdfc292d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706B 5180 bytes
font_01_sfnt_off00008200.bin
500c581ed7e17955e915998a3318d9f7d5ce091cce4526a1434d837b58771fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8200 12192 bytes

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