Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2f89a8b26b0e31…

MALICIOUS

PDF

33.7 KB Created: 2020-08-09 05:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6102235d6fa77ef73fdde27641c2b1c SHA-1: a41a25d05f6064fca5b5f40d061ed485d9a9a3e4 SHA-256: 7b2f89a8b26b0e317a985dac74f1ec04551e545a3885516758aa728fee161d30
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a catalog, which is likely a lure. The presence of many external PDF links, some benign and some unknown, indicates a link farm strategy, potentially for SEO poisoning or distributing further malicious content.

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=bticino+my+home+catalogo+pdf
    • http://files.johnhenryiii.com/uploads/1/3/2/8/132814933/9965030.pdf
    • http://files.rachaelwshah.com/uploads/1/3/2/8/132814967/lexoxeg.pdf
    • http://files.singingsawpress.com/uploads/1/3/0/8/130874180/logid_godufovipubis_tatuma_xizarepewozip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/68912999976.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/90211647071.pdf
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/gta_vice_city_cheat_codes_for_bike_and_helicopter.pdf
    • https://cdn.shopify.com/s/files/1/0432/4366/7616/files/tokafarazumidugikanalujug.pdf
    • https://cdn.shopify.com/s/files/1/0446/4692/4451/files/metro_map_moscow_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/90881091516.pdf
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/gajage.pdf
    • https://cdn.shopify.com/s/files/1/0436/9632/4761/files/85294822047.pdf
    • https://cdn.shopify.com/s/files/1/0434/2523/5111/files/77417338981.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/xesovawimolunefil.pdf
    • https://cdn.shopify.com/s/files/1/0431/9032/1313/files/12983957418.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9607/files/cancellation_of_contract.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/35909019017.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_off0000462d.bin
6ad123862c0165c93d0dfc56bd33998495f83b86419409e748849812c8c8c44e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x462D 5448 bytes
font_01_sfnt_off000058a3.bin
eab7300870e4aad7a2e0f0513a77d883d9ed99f66c9b13e47de04afbbf2efc32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A3 9776 bytes

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