Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1af7346a69964a8…

MALICIOUS

PDF

33.6 KB Created: 2020-08-01 14:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f65764d11bd83352ed62fc0f6ce0108f SHA-1: 8a97b703e0b4455aff4d5791e98163a3bee195b3 SHA-256: e1af7346a69964a8fd6a07d707c9e3515abc623f8ea1097c0c163b6f10aa0af9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The primary malicious link is https://ttraff.cc/pify?keyword=super+mario+advance+4+rom, which is designed to lure users with a game download lure. The document body contains garbled text but also includes the target URL, reinforcing the lure. No scripts were extracted, but the PDF structure and link farm indicate a phishing or redirection campaign.

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.cc/pify?keyword=super+mario+advance+4+rom
    • http://files.loveandmercyfdc.com/uploads/1/3/1/8/131857071/tazowirujuvimi.pdf
    • http://files.brentwoodbayvet.com/uploads/1/3/0/7/130775583/pezos.pdf
    • http://files.gemmabellydancer.co.uk/uploads/1/3/1/4/131414134/diruw.pdf
    • http://files.belllog.org/uploads/1/3/0/7/130775827/2358242.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/rapeduzozadedugodudupomar.pdf
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/33224359555.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/11371566848.pdf
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/lidodejopixazogi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/12750452255.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/muxaresarovomukaxovuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/97619329031.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/ketux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/ditilukamomunurinuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6521/3089/files/lujamujasexeno.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/24527244894.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/92812104584.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/bosutotutebafeguxutuzunup.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_off000046b8.bin
fd98ae26d93784633e641850a5131eb4cf77fec473f586c13db86e1602603452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46B8 5260 bytes
font_01_sfnt_off00005891.bin
63ecd4b4b495e9a9ed7e6dc227b46b92de42ef7a4fa5b587a68439edbd128ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5891 9664 bytes

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