Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9d18a0dccf15a3…

MALICIOUS

PDF

62.0 KB Created: 2020-08-12 23:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec041a8a26efa60956ca71ef542f80fa SHA-1: 7f86525fe94c8aaffa3ed08b2caa1ad8e440b0fd SHA-256: 7e9d18a0dccf15a3575ccc2f90a53f4922672d7c0d09e9e835575422add845b5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at ttraff.ru. The document body, though partially corrupted, suggests a lure related to a 'corporate identity manual template PDF'. The presence of multiple Shopify links, some flagged as benign and others unknown, indicates a link farm strategy. The primary malicious IOC is the redirector URL, which likely leads to 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/wb?keyword=corporate%20identity%20manual%20template%20pdf
    • http://files.dmyoga.co.uk/uploads/1/3/1/3/131380083/tivek.pdf
    • http://files.nod-production.de/uploads/1/3/0/7/130776118/3864674.pdf
    • http://balide.skyfensilk.com/uploads/1/3/1/3/131379706/wupulamaliwig.pdf
    • http://files.serbianheritageacademyofcanada.ca/uploads/1/3/1/4/131406365/e6d61.pdf
    • http://files.digivationsxgens.org/uploads/1/3/1/0/131071114/miniwifazif.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/76050327137.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7978/files/ret_pally_icy_veins.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/lovowemid.pdf
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/vapemarane.pdf
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/7996482484.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/amazon_redeem_gift_card.pdf
    • https://cdn.shopify.com/s/files/1/0437/1048/0537/files/17735491249.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/64264720760.pdf
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/tonoxurulozof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/flip_flops_in_digital_electronics_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/rofivezavewuredugaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/bemujakosijonuvijofawika.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_off0000b6d3.bin
531559a25a70e6f55c997024be472f4063c8c33c18ddeac747d31ae0bfb1e1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D3 5016 bytes
font_01_sfnt_off0000c7ce.bin
67f13eb121cf1cd82678700fb7ce8cd1995bc83e7c85286920f569ecd726ac23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CE 10324 bytes

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