Malicious PDF — malware analysis report

Static analysis result for SHA-256 1595f7589cd07085…

MALICIOUS

PDF

40.6 KB Created: 2020-08-19 23:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05a18065c2220607161321432d8dda92 SHA-1: 923f566bcc90e103770b714741b06b220754c772 SHA-256: 1595f7589cd07085942b85405143b75a874c481a1a9a99401ef5e8f656abeed1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The document body and heuristics indicate a lure related to a game update, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious 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.com/pify?keyword=bloons+td+6+update+apk
    • http://files.greatmexgrillmesaverde.com/uploads/1/3/1/0/131070374/02f1847db91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/6706/1925/files/82346060578.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/77623296789.pdf
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/vetadurezoseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/6343/4654/files/verizon_fios_rhode_island_channel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/jupin.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/sigimuzutulipopos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/desanarujekadujumoxup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/62143767425.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.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_off00005e5a.bin
216e43e070746aefefd67943ded444b9234b7f1823a088823701ef4260b3e65c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5A 5124 bytes
font_01_sfnt_off00006fd9.bin
f25f78d24fdb136664fb539f477ccc056370ffdf4faa9b879439ffb0c8d64a73
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD9 11860 bytes