Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6596a0d82f9809…

MALICIOUS

PDF

36.7 KB Created: 2020-08-13 09:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebfc1b7b2dacbe24dcc14b3cce5d8b83 SHA-1: 1be696f031aa7175696d7b154e3d98c2f96f4917 SHA-256: ee6596a0d82f980937d9af074e8bdfc3491a76223e846e29d3bf9608261002a2
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.com, disguised as a dishwasher manual. It also exhibits characteristics of a link farm, embedding numerous links to other PDFs hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive document lure.

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.com/wb?keyword=beko%20dfs05x11w%20slimline%20dishwasher%20manual
    • http://files.redrockfurniture.co.uk/uploads/1/3/1/4/131407445/9883553.pdf
    • http://files.ambrosescholars.org/uploads/1/3/1/4/131453453/a17c08d391e0.pdf
    • http://nujeroviw.townofbradfordwi.com/uploads/1/3/1/3/131398020/14a34a5.pdf
    • http://wopetamiw.missionhilldental.ca/uploads/1/3/0/7/130776078/vokavogifebar-mubun.pdf
    • http://molel.ritzemaportfolio.com/uploads/1/3/1/4/131406893/087a02a0f0cf43.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0011/files/wamapumobomuros.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/81740272087.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/77831783113.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0886/files/zesagov.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/44635393634.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/46022645800.pdf
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/les_acariens_du_sol.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/ropaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/centuries_of_meditations.pdf
    • https://cdn.shopify.com/s/files/1/0437/0114/1657/files/free_download_britannica_encyclopedia.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/zezuboz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/68497578235.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/7001213131.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/35729018578.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_off000050b6.bin
cd606d77ef3e1172bfd77b71f28ee3a1ff4564bb627c17611bc5839bc0f930ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50B6 5740 bytes
font_01_sfnt_off00006437.bin
742773b5457690a3e91a72ac5ecde624600d6239f95428ce01f891da3a6a2f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6437 9704 bytes

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