Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ad0ae52f7dddc9…

MALICIOUS

PDF

46.8 KB Created: 2020-08-06 10:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be34a17ef195c401782d73ee6ebdf9e3 SHA-1: 0cbb41c061aaa5ac4977c61f99ea93a47296e658 SHA-256: 64ad0ae52f7dddc974411dac4faff73725bce007d611b38fb5753f8a54f5147b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, suggesting the intent is to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=adonis+golden+ratio+pdf
    • http://files.artworksinmind.net/uploads/1/3/0/9/130969824/fofikitobuvo-dadom-telededaxin.pdf
    • http://files.buildingboxes.co.nz/uploads/1/3/1/3/131398134/03dcc21d70e.pdf
    • http://files.detroitlakesucc.org/uploads/1/3/1/4/131406544/netudinekepazafaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/dupiluk.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/zijuvuxeganuzokipazomov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7236/4437/files/90836187835.pdf
    • https://cdn.shopify.com/s/files/1/0428/6159/2742/files/38711403810.pdf
    • https://cdn.shopify.com/s/files/1/0437/4147/9066/files/67967739877.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59044096386.pdf
    • https://cdn.shopify.com/s/files/1/0439/7917/8142/files/bfuhs_holiday_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/7773/8399/files/91168970660.pdf
    • https://cdn.shopify.com/s/files/1/0438/8339/7275/files/41563375494.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/71210220225.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/94466486046.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007019.bin
46c640dc223fff778e91a778f74d4d738df8f35d317d5c404e6daadd19b387f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7019 5200 bytes
font_01_sfnt_off000081cf.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x81CF 1800 bytes
font_02_sfnt_off00008a5c.bin
1acaf03bbd35b04bfb8cdd178846677a3c4d972591bdbe4fbd678187e1525c64
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5C 10488 bytes