Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27e5c818e3bb144…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 06:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f053613a01d0bf81327b03a8ffbb1a92 SHA-1: dffc8534fa2d1afff2e45479a0c290f53d57929c SHA-256: c27e5c818e3bb144e0ae4a543ebd070d110201c9005d5d5e6e6417f6d8348b82
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a significant number of embedded URLs, identified as a link farm. One of these URLs, 'https://ttraff.club/wix?keyword=40+g%25C3%25BCnl%25C3%25BCk+cenini+k%25C3%25BCrtajla+ald%25C4%25B1rman%25C4%25B1n', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.club/wix?keyword=40+g%25C3%25BCnl%25C3%25BCk+cenini+k%25C3%25BCrtajla+ald%25C4%25B1rman%25C4%25B1n
    • https://static.usrfiles.com/ugd/b8c837_674781065962444f941d623837850560.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6247f754daa4a7dbd816da461b6224e.pdf
    • https://static.usrfiles.com/ugd/defdb4_f4164bdd5d674c7e93bdadfc67973a1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_790dd339d1a04b8fb4af639928740fc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2dd31e295c840e3af053e1176413e6c.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/muwulijugojekobizer.pdf
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/meeting_rooms_ii.pdf
    • https://cdn.shopify.com/s/files/1/0430/6419/7273/files/self_confrontation.pdf
    • https://static.usrfiles.com/ugd/8127dd_99f175cc78eb4ca2a3a58dda70805edc.pdf
    • https://static.usrfiles.com/ugd/5438e3_b77eb8ea75b04ebcb6d1a78b258fa87c.pdf
    • https://static.usrfiles.com/ugd/04e6f9_0d03c6bdb90f4eb3935e7bdd6a8b2403.pdf
    • https://static.usrfiles.com/ugd/b42fd6_52d0a75a3fac485facb8aba812f8eb85.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_2db32ebf32b54bfa9981f56a006bdc2f.pdf
    • https://static.usrfiles.com/ugd/83e24f_92aa43d9c2a746f9b191b1ea79451d0b.pdf
    • https://static.usrfiles.com/ugd/db93e9_74128816533c4a6cbb3c3904a89ff7c7.pdf
    • https://static.usrfiles.com/ugd/87a178_6e20d39669624041accb6b27dfcfb9f7.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f1c.bin
11225653d09d780fdce91206b529963d972255ad051d6c64737af9abc38977f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1C 5184 bytes
font_01_sfnt_off000070a5.bin
07d851076fa6ff6fe85bbfcd518364d595c6eb8542ba90263704004d5d063c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A5 11264 bytes
font_02_sfnt_off0000945c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x945C 4324 bytes

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