Malicious PDF — malware analysis report

Static analysis result for SHA-256 d83051c32f09b0c0…

MALICIOUS

PDF

110.9 KB Created: 2020-07-22 11:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 751a362eeeb97239552c90928b11504a SHA-1: f0c77dee1723bd340a27da5e0245c711ee44c69f SHA-256: d83051c32f09b0c091aa6b8153efe40844e7048c368c4537f04aefaac7ee8053
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for malicious redirector links and a link farm, indicating a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains keywords related to a "master mason catechism pdf" and mentions "wkhtmltopdf", suggesting a lure. The primary malicious IOC is the ttraff.ru URL, which is flagged as a malicious redirector.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=master%20mason%20catechism%20pdf
    • http://files.naturopathgoldcoastqld.com/uploads/1/3/0/7/130774965/vosuleve_wabinesovisapas_wumorez_kuwitonom.pdf
    • http://files.katharoscatering2go.com/uploads/1/3/2/6/132682826/konemusuzetamevijom.pdf
    • http://files.hartistmetals.org/uploads/1/3/2/8/132814272/loxexojo.pdf
    • http://files.caseyslife.com/uploads/1/3/1/4/131452950/dodifapapam.pdf
    • http://files.jasondearingprops.com/uploads/1/3/1/4/131406391/3271362.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/35221264404.pdf
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/65075439256.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/83081058094.pdf
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/nonixoxemoxonuperisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/nimiwarutamizokegimide.pdf
    • https://nuzesuxotuv.files.wordpress.com/2020/07/65634715016.pdf
    • https://zizugulavak.files.wordpress.com/2020/07/vubota.pdf
    • https://jarojadum.files.wordpress.com/2020/06/nisadozodojipebufepuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/novirepikegez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/66607979710.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/nolanaborer.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/51459280933.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zitadeduwifugegumav.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/32466708154.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2113/files/jimesabukipovad.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/mufotowofebiralikome.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/14013860803.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_off00017997.bin
1c50a05f11b75658b87b78dc8f86e006519a7cb3f4f620343fd3f166990b66c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17997 5156 bytes
font_01_sfnt_off00018ae9.bin
e1a1eb4f4a78c8dea1b29f692edf34ddb70a6a7ef630c32b09afbe1f18f0236f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18AE9 10096 bytes

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