Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bac10c80a9162a…

MALICIOUS

PDF

67.3 KB Created: 2020-08-19 20:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e104900c25f2d2dd737f8de32339f9f3 SHA-1: 39d8b9ad7d1d2793d9b03397343415da6e6349ef SHA-256: 32bac10c80a9162a883b21a7fbc06adf47be7cbf94229c1b09f6d5c685422d84
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a significant portion of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=free+live+tv+apk+2018'. This suggests the document's primary purpose is to lure users into clicking malicious links, potentially leading to phishing sites or malware downloads. The ML classifier strongly supports the malicious nature of this PDF.

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=free+live+tv+apk+2018
    • http://vemepaf.myhelpdesk.store/uploads/1/3/2/6/132681352/sefinanaxororo.pdf
    • http://fudokagoz.naianinternational.com/uploads/1/3/1/1/131164132/c75ace3b5c00181.pdf
    • http://xoful.flopinions.net/uploads/1/3/1/8/131871745/tuxami.pdf
    • http://files.myonlinehomeopath.com/uploads/1/3/1/6/131606755/3c1d1fed88385.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/75734639703.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/moxurokuzomisej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/fetugoponuvibepufitafebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/you_can_win_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/kenetegis.pdf
    • https://cdn.shopify.com/s/files/1/0438/4020/9056/files/63835402415.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/nelurafanuvaferup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/should_mobile_phones_be_allowed_in_school_debate.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/8301191272.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_off0000a801.bin
761f7af7247544826609e91ea5d305628349c5006e5dc614e3b2ffde96b186e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA801 4808 bytes
font_01_sfnt_off0000b867.bin
98e8331018a1a7480fce37b96018cfb9bdd259604a3531f287d17e351aad2ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB867 10592 bytes
font_02_sfnt_off0000dcc9.bin
aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC9 16148 bytes
font_03_sfnt_off0000f1bf.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 4324 bytes

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