Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6d2e72f04b0030…

MALICIOUS

PDF

70.1 KB Created: 2020-08-30 17:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfcc441b558dc4a5acf4820463b293ac SHA-1: 62f76dae0a2cb3c862754a1541b1fe8abc0a1525 SHA-256: ec6d2e72f04b00300715c1ee6e764920eed4de2155e5822fc4f97d411b8ddb54
152 Risk Score

Malware Insights

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

The PDF contains a link to `ttraff.com`, identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same URL. This suggests a phishing or social engineering attack aiming to redirect the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=hp+officejet+6500+service+manual
    • https://static.usrfiles.com/ugd/493135_a0ec95ea1d444f5fa04e232d848a4281.pdf
    • https://static.usrfiles.com/ugd/5926b4_31ce20faac31424cabf6916ae423f367.pdf
    • https://static.usrfiles.com/ugd/2e16aa_9c06c1222f474d19b5cff1eae709e3af.pdf
    • https://static.usrfiles.com/ugd/b8c837_b61bc9fbd99246759c08a3cfb8b7cc2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9484169f27cb4bb9ba43388afdc33d1b.pdf
    • https://static.usrfiles.com/ugd/136d07_cf9b8f7761d34a8eb692192af50dfa54.pdf
    • https://static.usrfiles.com/ugd/f65518_bee7d4c8077f43c4a5646e6f96e74c9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2575ec882dff48b9964eae78e446db25.pdf
    • https://cdn.shopify.com/s/files/1/0437/0992/3480/files/gijojem.pdf
    • https://cdn.shopify.com/s/files/1/0435/6594/0904/files/baritone_ukulele_chord_bible.pdf
    • https://static.usrfiles.com/ugd/b8c837_55ccc61bb7a942039f0ba64841579924.pdf
    • https://static.usrfiles.com/ugd/5b5da7_535bf3befadd4a4db4ef3c9f9fa39724.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e0f500d713148e38461148786b0980f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e898f1ed37344118bfd8818e42426099.pdf
    • https://static.usrfiles.com/ugd/6908d7_8b581117c8244dc7b9c9cdef11d7ccc3.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_off0000b33c.bin
a36f38899889b39dd67acce30c1dffd6167c37c2f685f9723cac84a634a3e57b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB33C 5676 bytes
font_01_sfnt_off0000c681.bin
7d7f0a106fcbfd66f603131eea6ce7516c75a4cf3257625ec5e8327b01831247
pdf-font-stream PDF embedded font (sfnt) at offset 0xC681 15268 bytes
font_02_sfnt_off0000f5d3.bin
06d84a79787f49517cba9647d12dd77c675544b9e46e70dbd0c3ec2b8d2a160e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D3 16132 bytes