Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b73b17bd4c50d7…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 18:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 982b92805642952af5447c73ea9b4804 SHA-1: deaa9a8f8263e08c43dc37ca31a8d00b8adb576e SHA-256: 11b73b17bd4c50d786ce53381560d964a57c37c8601497d62f9956f7e8731d65
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/wix?keyword=the+great+indian+diet+ebook'. This URL is likely part of a phishing or scam campaign. The document also contains a large number of embedded links, many of which are benign, but the primary malicious link is the most concerning. 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.cc/wix?keyword=the+great+indian+diet+ebook
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_b81ac38642b74f08bdbb3dde42b2d1c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0982783c8a74a7fbd26e7c57e3af696.pdf
    • https://static.usrfiles.com/ugd/accd1f_24703480d62a446c814e1848e02338c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_aafe7d4a9c8c49fa97a38022815f22f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a22c593eb244513be12de1ec415c45a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a237b3e8fcd246cfb4581f8e41c99f53.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/lojisixavakalogetesinanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2581582401.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/42905509264.pdf
    • https://cdn.shopify.com/s/files/1/0429/0111/0940/files/calculate_roi_in_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/9992/1315/files/rakebulawuzesufek.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/sisetalenifoxagajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/15062143232.pdf
    • https://cdn.shopify.com/s/files/1/0440/1928/6174/files/75369052511.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/minecraft_seed_map_ps4.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_off0000695f.bin
041e85930cadf350af4b31a52126db3b46e2e76035251c5e5b3133fd5f143606
pdf-font-stream PDF embedded font (sfnt) at offset 0x695F 5028 bytes
font_01_sfnt_off00007a72.bin
22e6b0d304deffcc1e0a170c44af43d900f684b4b562375a03e20244ec162e8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A72 10496 bytes