Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b105960afe0e84…

MALICIOUS

PDF

46.2 KB Created: 2020-08-29 18:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca7e38e4a53adebd147f2fe874cb5166 SHA-1: 68fb409b0cfe1bd596b8f9a54d0adf71f2be8592 SHA-256: 08b105960afe0e84968d4915bca632a247659be1e744b618c927828dd783b628
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 external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as the initial lure. The ML classifier strongly supports the malicious nature of this PDF. The primary function appears to be directing users to a network of linked content, potentially for SEO manipulation or to distribute further malicious payloads.

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=spycraft+rpg+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/97643528224.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/98231627202.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/adobe_reader_gratis_bagas31.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/sojixetifetonomopegolulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/23353205917.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/44331129438.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6560a86dbcf4117848d2f1d9867529d.pdf
    • https://static.usrfiles.com/ugd/b8c837_940384b7959d48c39fa2658203273150.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_2da6effcca794260ab2695692ac70d55.pdf
    • https://static.usrfiles.com/ugd/b8c837_2857027b6bdf4e08b0a0cc143409fb2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_acbe67c5670a45ecb7dbe5837abaf431.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/bodokorexoxojujenapeji.pdf
    • https://cdn.shopify.com/s/files/1/0462/2024/7194/files/20810939133.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/lozimenagejo.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_off0000779f.bin
b702525c1b4b2a2f69768dc011df455df18bb96ea1cc3b39320a51c6f3e7c561
pdf-font-stream PDF embedded font (sfnt) at offset 0x779F 5320 bytes
font_01_sfnt_off000089c6.bin
95572f21c2dbf18e6e6f0b99b8f45dd022f58b00445920419759fd9f159c2986
pdf-font-stream PDF embedded font (sfnt) at offset 0x89C6 10144 bytes