Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7243d6ba807bfe…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 18:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02ebf18c5234d40a60b82f1ace8c8df1 SHA-1: 9bfbe4ca497e7d9f0150d487555e0032a7336088 SHA-256: 5e7243d6ba807bfea6da8c18db6e65013d4a9f5ad62f0ab17fcafb0ec6e6be8d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same redirect URL and mentions 'tent card template word 2013', suggesting a lure for users seeking templates. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points to a link farm or redirection strategy.

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/pify?keyword=tent+card+template+word+2013
    • http://files.whitneyhorrocksfineart.com/uploads/1/3/1/8/131856119/konazopodomi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4376/6950/files/85717047374.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/xexuniwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/kadetakifijagamabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/area_del_triangulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/5757300648.pdf
    • https://cdn.shopify.com/s/files/1/0430/3080/6679/files/dipovataweniwufezi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5837/3542/files/tumotozawefunudimuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/bulivutifubu.pdf
    • https://cdn.shopify.com/s/files/1/0454/9804/0472/files/95595249377.pdf
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/bamekonuburiralurap.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064b7.bin
40c6dcb76d0e56294099601bb6198cbb7059c1d04f5bc0542dfef0c431ea4a47
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B7 5572 bytes
font_01_sfnt_off000077aa.bin
57659ee910c71d240f915bb267b3c691e6e2467e3ae7c82b830f15b1c9dff298
pdf-font-stream PDF embedded font (sfnt) at offset 0x77AA 10080 bytes