Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6329ad71316f48f…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 04:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee62ed1eede3f07b5d0fa18916a7b396 SHA-1: c1fac3a2dbbc7b0a648248691d4e829864da2097 SHA-256: a6329ad71316f48f013381a563c734e9799ac382603c6677b3f7bdc5e3139c4c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating it's a malicious redirector link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=breville+coffee+machine+guide', points to known malicious infrastructure. The document body, though heavily obfuscated, also contains this URL and numerous other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content or manipulate search engine results.

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=breville+coffee+machine+guide
    • http://files.reedleyhslibrary.com/uploads/1/3/1/6/131606289/lojujitiwegipik.pdf
    • http://segof.beyondhappyatwork.com/uploads/1/3/1/6/131606069/bugod-zilowijizogo-sisofukekud.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/muvovuxineromilavipopibab.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/butiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/70893025421.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/nematodes_in_soil.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/88697648058.pdf
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/81653626027.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/toomanyitems_mod_for_minecraft_pe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7085/7124/files/rejogiwuf.pdf
    • https://cdn.shopify.com/s/files/1/0447/8962/9079/files/64475388552.pdf
    • https://cdn.shopify.com/s/files/1/0431/5240/8742/files/jefel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/32719917757.pdf
    • https://cdn.shopify.com/s/files/1/0439/0790/7752/files/binary_to_decimal_python.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/36330168616.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000686d.bin
7bda2af9d23f74b16464888dd22401295b996ef22f8123cdc123a1b25cc295d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x686D 5368 bytes
font_01_sfnt_off00007a87.bin
e3ad0a03805a06ef973f11467c94cf3f358e599c29a8f5ea9a809a8bfbbda28b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A87 10836 bytes