Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca22e90f16c1f43…

MALICIOUS

PDF

74.6 KB Created: 2020-09-03 08:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da718e369895200f70820b9ac8fa83e0 SHA-1: 69e6db637057efb769150b8951c5dbed23e11f72 SHA-256: 0ca22e90f16c1f433d90d3df7971b10ee91261c7362a871e50abf54a3de752b9
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also contains a large number of external PDF links, suggesting it's part of a link farm. The 'SE_CALLBACK_LURE' heuristic indicates the document may be designed to trick users into calling a fraudulent support number, further supporting a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.club/wix?keyword=breach+of+contract+claim+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/todukosopete.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/rurouni_kenshin_new_kyoto_arc.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/comparative_adjectives_word_search.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7079/files/52459815797.pdf
    • https://cdn.shopify.com/s/files/1/0435/3300/9047/files/zidopupeset.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5966/files/11804905157.pdf
    • https://static.usrfiles.com/ugd/ca32a8_d5c8cd8f4b104e03b9dc63d6b11da40b.pdf
    • https://static.usrfiles.com/ugd/135178_0ce63ed766cb4e9bb1016eaad19e0d0f.pdf
    • https://static.usrfiles.com/ugd/913720_e2a67e5e9d874050983af04aab479c94.pdf
    • https://static.usrfiles.com/ugd/c1de29_8502f958da1c4b8ebb2d292ca0a5a519.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_off0000e992.bin
de1c5c51b27fe9243ece9e4e911265b47d2f82e63902dffe9317b085eabf57fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE992 5128 bytes
font_01_sfnt_off0000fadd.bin
d1bf5a4298fffcedaa0668402c46cea7fce74cf2a9bc366c1ff555841b54d8f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFADD 10120 bytes