Malicious PDF — malware analysis report

Static analysis result for SHA-256 6283b4ed1cc4f1be…

MALICIOUS

PDF

38.2 KB Created: 2020-08-31 14:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cc6553ee84708133667e1d9b2795bc9 SHA-1: ab457f97fde997454e76dba021d9f19c4613bd98 SHA-256: 6283b4ed1cc4f1be8fd2790ddf78d63e56b6f706ac1addabde0bb9a74717d4e0
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics, including a critical finding for linking to a known malicious redirector. The document body contains what appears to be a technical document title, likely a lure to encourage clicks on the embedded malicious URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=2017+field+operations+guide+ics+420-+1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_c064f48203fc4112bd9e96fab972b9f6.pdf
    • https://static.usrfiles.com/ugd/225520_a79ba049b129472a8273134f20ece517.pdf
    • https://static.usrfiles.com/ugd/c20ea7_d0d1983189074bafa4713eb8c8a6807c.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_754fa4cfc1cf4ad9b5d85f2994355a32.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/27854440042.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/annual_report_of_a_company.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_b49a821fac2e46ccaba940c9226409da.pdf
    • https://static.usrfiles.com/ugd/b8c837_2834bcfd68bd46e392f192ff386ad85c.pdf
    • https://static.usrfiles.com/ugd/b8c837_da1f8dafe5cc4902892627a4f428c04b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a96ba4d53c5d49dcb42b83e3e8453bac.pdf
    • https://static.usrfiles.com/ugd/b8c837_656e513a77274f1c97b5d609382164e4.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/43800580419.pdf
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/rosub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048e6.bin
7eafa721de92b7d11314c031c6f6412c5e5dca694052e46d9c69a58aba0f4030
pdf-font-stream PDF embedded font (sfnt) at offset 0x48E6 5636 bytes
font_01_sfnt_off00005c26.bin
961ac9d7dca9cdc5f60f50fcb4c380554cfa758163d15ff7cea180f626c8dbb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C26 9932 bytes
font_02_sfnt_off00007e23.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E23 4324 bytes