Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22fcdabe2833a31…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 18:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06b3cfd04b8dd9e1faff9248f9a47d32 SHA-1: 84b4de39cbf989a27a7cefef92d011afe239cbc2 SHA-256: f22fcdabe2833a31398affe90fb185faf841dc15354731e4a8819ff34534581b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is likely used to funnel victims to a malicious site. The document body, though heavily obfuscated, contains keywords related to 'technical communication' and references to the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The PDF also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to benign content but serve to obscure the primary malicious link.

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.link/wix?keyword=technical+communication+anderson+8th+edition
    • https://cdn.shopify.com/s/files/1/0460/3625/4879/files/libro_modelo_canvas.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/texas_dmv_form_130_u.pdf
    • https://cdn.shopify.com/s/files/1/0447/0757/8009/files/abdul_kalam_speech_in_english_for_students.pdf
    • https://static.usrfiles.com/ugd/575363_8b4f626a90214f4aa8224af290b972c5.pdf
    • https://static.usrfiles.com/ugd/0047a4_9df146635ad046a09aa3d039af7115bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_1af16ffb28e6454c916cbb9a6fc20157.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3cc08bbea914980af47646a1456721e.pdf
    • https://static.usrfiles.com/ugd/78c764_4a6c848f48c44078bce794e8897fbf14.pdf
    • https://static.usrfiles.com/ugd/286fb8_1b306840bdf04b7dba233c24b0e723e8.pdf
    • https://static.usrfiles.com/ugd/65b209_5c50ba644e0c4236943a33f9a5c2efaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/juwizigebizaleboral.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/gugugolunatilafav.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_off00006bb4.bin
4a14cd35d995a132a691e4f34654812d112dc5a77752239e33f4b2871de76b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB4 5320 bytes
font_01_sfnt_off00007d8e.bin
7c25313b82d7a3c85032561b51aef08933fdb981330d951cab972bbbf5595319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8E 10096 bytes

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