Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc7ddb1839f931a…

MALICIOUS

PDF

50.7 KB Created: 2020-08-31 22:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51aa443846841c226bc37461f06a9b68 SHA-1: 286eb01f50128f1b139ee7842d97882badf68912 SHA-256: 5fc7ddb1839f931aebc47177db10372f033d4dc285493f093abc58ecdc7d311b
154 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, directing users to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which point to 'usrfiles.com'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector strongly suggest an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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.com/wix?keyword=learning+robotic+process+automation+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/33a16d_70801eb3e6cb4baf9877269d261044f6.pdf
    • https://static.usrfiles.com/ugd/628a76_9856f09e74b944adb8ecdc72a8eef386.pdf
    • https://static.usrfiles.com/ugd/b8c837_3817d52ff11649bc92c5abae18723297.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aae4917859e4932aac2d8b100caaea6.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_048e0675edad4b6ea3f327b9642b7e69.pdf
    • https://static.usrfiles.com/ugd/3be3a7_785bdd397d1840d7bf6f67884929e6ef.pdf
    • https://static.usrfiles.com/ugd/cc14e4_8736e465c0564dffb3b4ae8eb8aae2e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e0f6f997bcb4a4ba617ecf9cb4b2ecc.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_fa7bb5ef052d4dd9a1d7118e07549dd3.pdf
    • https://static.usrfiles.com/ugd/430cb2_0bee74ee769f4ba0b81e604c674fee11.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/yoga_pranayama_breathing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0614/files/jibel.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/scaled_agile_framework_4.5_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_230c1e8b6a9d45e997fbecb745af5ea6.pdf
    • https://static.usrfiles.com/ugd/d01287_63052765929a47d9942761f9c7e4acc4.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_off00008688.bin
ac9c7906c720fce06dd8335327f0cb51659b770f93cafef99ce54546ca7e45fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8688 5524 bytes
font_01_sfnt_off00009936.bin
d2aa03e9095213d26b8bc0d70a237f06988a2e6957d5b4c0c40f923edd16b921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9936 10580 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.