Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8786cc60ab5bbe…

MALICIOUS

PDF

41.7 KB Created: 2020-08-04 21:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8970d43ea3c7e4e75abc048b1b39e75 SHA-1: acd200c77f7234a93f34f5e0ccec00d5a443118e SHA-256: ab8786cc60ab5bbebac78ecffb680f3482b47d17e2f4a143ba949d653461afd8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary URL, 'https://ttraff.ru/pify?keyword=barycentre+cours+seconde+pdf', is identified as a malicious redirector. While many other URLs point to Shopify, the presence of the redirector suggests an attempt to obscure the ultimate malicious destination, likely a phishing or malware distribution site.

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=barycentre+cours+seconde+pdf
    • http://files.greateragapedeliveranceminitriesinc.com/uploads/1/3/0/8/130873921/2aca02.pdf
    • http://files.satellitecityhall.com/uploads/1/3/2/6/132683264/pifed_jixesebezawazap_rovorivuv.pdf
    • http://files.joshchrisafis.com/uploads/1/3/1/3/131379567/xutivoxetugelifezix.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/tusajabapisiwak.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/xepoxaful.pdf
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/sum41_pieces_lyric.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/52129447217.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/rodazetusiniposim.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/mawanasejuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/ridapejivo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/posafazoxobexovaromepusu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/linewisosidu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/juwovaruzulosebi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/67039795369.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/kidozegobagivumurib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77650869017.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/color_by_number_christmas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006169.bin
6a116ac98b7d9a57495cc3ec9b285470e00a13341fd366ca3b6ca9ad64b15f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6169 5268 bytes
font_01_sfnt_off0000736f.bin
0277817125a2af88618693070e86d454cf54ebe67cc98482cd2c0893d98e1d4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736F 11720 bytes

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