Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb59cd226b29559…

MALICIOUS

PDF

40.6 KB Created: 2020-08-01 11:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ee72808c982309aa001681c74d99248 SHA-1: 940dc0bd89f2d15eee3f7d9099ccfc1740e7f888 SHA-256: 5cb59cd226b29559ea6872d77ff02116b3a4a5a9cc3ae88680bc95c4d393c2df
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=sublime+sublime+zip`. It also exhibits a PDF link farm behavior, embedding numerous links to external PDFs, many hosted on Shopify. While the document body text is heavily obfuscated, the presence of the malicious redirector URL strongly suggests a phishing or scam attempt designed to lead the user to 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.ru/pify?keyword=sublime+sublime+zip
    • http://files.sioceansidecarlsbad.com/uploads/1/3/0/8/130874658/tafupel.pdf
    • http://files.911bodyresq.com/uploads/1/3/0/7/130776118/natarudul-wasawebi-pifag-nisaneneduk.pdf
    • http://files.melfair.com/uploads/1/3/0/8/130813694/77f95ac64.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/lirumofibaralixavixane.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/nazesajitenodemegevobina.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/kefezodokas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/26416091795.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/vebevafoxevatonesuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/46225519176.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/3295894892.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/61526983683.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/45407539724.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_off0000605c.bin
c14e787e8dff54cfc3747dc290c6844acf0b1a310c4ed59cf047a20ec3c83d6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 4952 bytes
font_01_sfnt_off00007128.bin
29131eebacfca2638dd791daf0924333064b7736e0939387e63daffa739b0b87
pdf-font-stream PDF embedded font (sfnt) at offset 0x7128 10848 bytes