Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e04a6c025f813f3…

MALICIOUS

PDF

34.9 KB Created: 2020-08-29 11:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e2ef18c79960000340d531d228cec74 SHA-1: d0a066ad18773029890f117c2d45cf5d00eee821 SHA-256: 5e04a6c025f813f3718fba8035ca4e17b03590666f7aee5067d43ced36db857f
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.cc/wix?keyword=footsie+babes+Modelle'. It also exhibits PDF_SEO_LINK_FARM behavior, with numerous links to PDF files hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body contains obfuscated text and the malicious URL, suggesting an attempt to redirect users to potentially harmful content.

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.cc/wix?keyword=footsie+babes+Modelle
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/58344994868.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/54300908215.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/bilel.pdf
    • https://cdn.shopify.com/s/files/1/0429/3070/0455/files/57781833625.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/87523934048.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/16491774432.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/vutazux.pdf
    • https://cdn.shopify.com/s/files/1/0461/7194/7161/files/furodezefulidekabita.pdf
    • https://cdn.shopify.com/s/files/1/0428/5300/7526/files/wild_seed_octavia_butler.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/fituletoxemuxekudizen.pdf
    • https://static.usrfiles.com/ugd/b8c837_88df5c8725814e8daedac952781e8b81.pdf
    • https://static.usrfiles.com/ugd/b8c837_63d90ac156de4c11bdc0aa0bbbf60d20.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bfba453dce84b34891ef63de4a2a1c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b330540573f4b00a02c3cdb65c57ae1.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa31fdb34c2c4170a71b12bf901b44b6.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_off00004b48.bin
52494d38f03a32d960d2516b0879cb0f362fd33963d10fb505e1cc3697579ed6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B48 4920 bytes
font_01_sfnt_off00005c19.bin
efe71811bc41ec7aac7e72d2ac9af61d31d657e495ebbff99095352dc5551e0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C19 10164 bytes