Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82334a95e8d7027…

MALICIOUS

PDF

50.3 KB Created: 2020-08-30 20:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3818bdad1ae20413edb28bfcef12ba14 SHA-1: d86b40de8b460c11c7425f2479b74cbb89af78b9 SHA-256: e82334a95e8d7027cad948f0d2b53aa1c3ca2c956738227487b6b6b0ffb30ba9
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. This indicates the document's primary purpose is to redirect users to a potentially harmful destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for this assessment.

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.me/wix?keyword=mvc+controller+return+same+view
    • https://static.usrfiles.com/ugd/b8c837_3390932eac314a89a94b0114d64dabeb.pdf
    • https://static.usrfiles.com/ugd/39cb9d_d9ddc3866c944efbac5b4494dcfb47d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f3a53aed817421298ef206ac3598351.pdf
    • https://static.usrfiles.com/ugd/b8c837_465b0c3ebe4b43219b3f6ec87d22ccf5.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/minecraft_coder_pack_1._13.pdf
    • https://static.usrfiles.com/ugd/804ff6_711c1573c9dc4e839d30e0a17eae3306.pdf
    • https://static.usrfiles.com/ugd/b8c837_29ad22c65e514da99772012ea466b01c.pdf
    • https://static.usrfiles.com/ugd/6c98bc_c5b4e7a9387b45eb82add214435becfd.pdf
    • https://static.usrfiles.com/ugd/b8c837_189295f9b67f465890b07b2c896eb7bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_c45b466862d24e3e9a3067ae7ffe2457.pdf
    • https://static.usrfiles.com/ugd/b0b521_7ee52ae4ca134f3dbd8341fc6820df5a.pdf
    • https://static.usrfiles.com/ugd/3e9e83_46e05d50249d4237a0ef6cb0305403fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_5291f69d52c0482185617380ee9b8f7b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008061.bin
8b670dc8f23a6ade0244dd7c82fd9a16d58f49b6da88e2ed6667cee0e0e4a0f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8061 5104 bytes
font_01_sfnt_off000091b8.bin
01fe8fcd02c2e402badc309812f099c44919e5786e4633e563521de0280be0a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x91B8 13192 bytes