Malicious PDF — malware analysis report

Static analysis result for SHA-256 99397978163b1131…

MALICIOUS

PDF

42.2 KB Created: 2020-08-22 02:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a21acd79d810c6c402f961cce7bdb176 SHA-1: 60ed2e6e56cabb7e41d1f16e5c26d89c9b777f92 SHA-256: 99397978163b11314ac2cd6269f4bf8f18c0af61cc2e809158917cd845c16140
150 Risk Score

Malware Insights

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

The PDF document contains a lure for a free wedding invitation video template, but embeds a link to a known malicious redirector at ttraff.com. The document also contains a large number of links to external PDFs hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, and the document body is heavily corrupted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=free+template+for+wedding+invitation+video
    • http://files.anroflowers.co.za/uploads/1/3/2/7/132712447/nitaboxoso-rexakiwe-xurukotuxubakux.pdf
    • http://vedifave.findingancestorsmadeeasy.com/uploads/1/3/1/4/131453197/kuvov.pdf
    • http://mipateg.jvstuff.com/uploads/1/3/2/3/132303134/jamajisow-vevojipifamade.pdf
    • http://pafubesel.alexandrahaleyart.com/uploads/1/3/0/8/130874679/2381894.pdf
    • http://nobudox.newyorkstatemuzzleloadersassn.com/uploads/1/3/1/4/131482995/xunukajazi-fewaladuzef.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/bebalepedogir.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0814/files/wubexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/64110416845.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/lejopopeda.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6992/files/basic_self_defense_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0439/6161/4494/files/cleric_character_sheet_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/41230680877.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3829/files/novoduwogiwufugapedosak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42228357160.pdf
    • https://cdn.shopify.com/s/files/1/0436/7787/6377/files/bigekuwezegekanoxuwi.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_off00006765.bin
6a60b2d75af51467a576b7f89ca9809a242d6d3a0d1b28f1391ed237213bccb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6765 5292 bytes
font_01_sfnt_off0000796b.bin
622ebc2dc49be1f7abc819ce6a6a2c397a88cdbcc27de84560e2047bce49fbe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796B 10120 bytes

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