Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1efce7203577ec…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 05:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2312af7b0c58f9653f6cb5a51030a3b SHA-1: 5dfc113e194b89b1f440e38443c848c5e8d544ab SHA-256: de1efce7203577ec536d6ac7381f9e8f7c2999813f7f7379eef5f13b55081455
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, with the first being to a Shopify domain. The ML classifier strongly indicates maliciousness.

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=how+to+combine+2+pdf+pages+into+one
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/estrategia_corporativa_michael_porter.pdf
    • https://cdn.shopify.com/s/files/1/0461/0218/4100/files/93549427091.pdf
    • https://cdn.shopify.com/s/files/1/0438/1900/8160/files/branches_of_political_science.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/zewuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9604/files/5737725605.pdf
    • https://static.usrfiles.com/ugd/3e9e83_38590c83c6074a4a938f484230d245dc.pdf
    • https://static.usrfiles.com/ugd/8b49c6_de3168a5c8324779b5de24f3e55b0258.pdf
    • https://static.usrfiles.com/ugd/b8c837_196c6694c5074fdab78e83b1d9110e4f.pdf
    • https://static.usrfiles.com/ugd/b88e3d_2d7bd055268144b7bc9f6ed622bc6cd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4467c5b00ebe4e0292dafdbfc202cd1a.pdf
    • https://static.usrfiles.com/ugd/bfbc46_af34bba5ec004263a7bb4c532fbb8934.pdf
    • https://static.usrfiles.com/ugd/26481d_6d539bb9d37b4e0bb4a627aa0b1abbd6.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_off00006263.bin
0adb0171674e46fce33c6de4121340b9b7e273936cbd689466215607827cd3fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6263 5672 bytes
font_01_sfnt_off000075ad.bin
23ec593bc1fe8964e429a3efe7572b8b587b118113cad7a34e2cbe28a2ba9edc
pdf-font-stream PDF embedded font (sfnt) at offset 0x75AD 10364 bytes