Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e817c7eb9079cf…

MALICIOUS

PDF

40.8 KB Created: 2020-08-01 05:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e81f3791ba3d089e19a3f90e5bf66b6 SHA-1: e6cfd55eb8621fbe27d89fe73da90c6a89dc8ea6 SHA-256: 64e817c7eb9079cfadd2ca2ee7a92d0133aa9e754e8f3d9f6dea34238a245676
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=music+genres+list', which is likely used to direct users to malicious content. The document body, though heavily obfuscated, contains this URL and other Shopify URLs, indicating a potential lure to disguise the malicious redirection.

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/pify?keyword=music+genres+list
    • http://files.okaysupermarket.com/uploads/1/3/1/3/131380848/1674421.pdf
    • http://files.pcomproperty.com/uploads/1/3/2/6/132695321/6223d.pdf
    • http://files.mahzedahrpopup.com/uploads/1/3/1/0/131069789/zevumurili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/53681964817.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2371/files/wifilodizoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/dobuzego.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/ropibosona.pdf
    • https://cdn.shopify.com/s/files/1/0438/2890/4093/files/najagegosafudo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/81118337357.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/7848668249.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazexirorojukulovamedifuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7210/files/96836794166.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/96819290846.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/73721443063.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_off00006325.bin
b32c2dc83b9462f0d6be568373571a5240719fe055464c9b1e0c1eae97f81ee0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 4760 bytes
font_01_sfnt_off00007374.bin
54aa6edaf13f12c0c16f2d948fb1222855698a6f0060c103ae737c26cdef62d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7374 10316 bytes