Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f98cb8d4be7729b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-29 13:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ea7c8d2043a3dac4a655dc5ef294bd2 SHA-1: e1d48a5e89a6b73969b3808e7b8f83ba2068a1d4 SHA-256: 6f98cb8d4be7729baa64f0933798437bfd7cab7f2afc14824674c29bf6a50e3f
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.com, but one critical link directs to ttraff.com, identified as malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to external content. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points to a phishing or redirection attempt.

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/wix?keyword=leveling+guide+everquest
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/winusulu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/circulo_concentrico_de_las_capas_de.pdf
    • https://cdn.shopify.com/s/files/1/0436/9960/1558/files/assembler_2_fichiers_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/fexugufijojisowesizo.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a52d105a9fb4055ab7ab6417f14f8a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef4d5570666d472f95499c01eed5264e.pdf
    • https://static.usrfiles.com/ugd/b8c837_28809952fede4e4fb7c3d8468397f802.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/enfermedades_y_trastornos_alimentici.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5868/files/vasokurufaxe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3421/2509/files/mojupejibolize.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36103472339.pdf
    • https://cdn.shopify.com/s/files/1/0461/4068/6489/files/4291345328.pdf
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/debt_dispute_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7013/files/81990474024.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/88853265701.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_off00006aee.bin
9bb02df70e1b05090ccc39599491dde6bcd08302f952d746afe4a61ff2742bde
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEE 4908 bytes
font_01_sfnt_off00007bad.bin
14e2220ed51eb503cd8a57ee16a9c0a681f9cafaa75c447e8c152217ddb44b62
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAD 9760 bytes