Malicious PDF — malware analysis report

Static analysis result for SHA-256 704307cc1aeed78f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-07 13:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82986cf96032ac14dd1ab13ee35b093c SHA-1: e63d8eab9395786b3cdcd62c0b60978875da6658 SHA-256: 704307cc1aeed78f9567f74084ea7dae57692ec446e9302f8c7f1e491b32ec60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=three+syllable+words+pdf
    • http://files.bargainbusnyc.com/uploads/1/3/1/8/131856257/68dbc.pdf
    • http://talexas.sevoparis.fr/uploads/1/3/1/8/131856772/kobanowawoboxe_xexananebi_zuxonapipin_zavabaluxof.pdf
    • http://xiwej.nationvszombies.org/uploads/1/3/0/7/130738799/witirarorotazosovix.pdf
    • http://files.fabledcollective.com/uploads/1/3/0/7/130740022/paladudiguzu_fojafesanekin_guxusewaxexize_wazari.pdf
    • http://files.speedway360.net/uploads/1/3/0/7/130739810/5527051.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86526592296.pdf
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/63799996123.pdf
    • https://cdn.shopify.com/s/files/1/0439/1891/7787/files/2855350026.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/telonubinegivik.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/domosakafuworazakagej.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6774/files/lowes_evans_ga.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/82313168012.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/bidejoninobopomemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuxevitilikibuvenimomabu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/american_mathematical_society_books.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_off000064e4.bin
ba49f39041d2a17e73286fcccc1eb49d9c2fdd639e478e1914cc32ff3f790085
pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 5412 bytes
font_01_sfnt_off00007756.bin
5e03e4d68cb08ac71f691a668903d8295beac7736528715a57edc94d30e3baff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7756 10292 bytes