Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be8717e48861589…

MALICIOUS

PDF

48.0 KB Created: 2020-09-09 08:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2bba1a32fd0ff23c8ad05e528044fef SHA-1: 0046e5574aa15ee63756ecb6fdeb83bf3832ee79 SHA-256: 1be8717e48861589e4b2387970cec339db97f1c1f31c6ca0623d67852c295239
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is disguised as a TV guide. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL and appears to be a lure for users to click on the malicious link, likely leading to further malware download or phishing.

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=tv+guide+perth+7+plus
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/95020411176.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/48126169956.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/73969691044.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/56680176302.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/zibuposo.pdf
    • https://static.usrfiles.com/ugd/f459ea_6e485ff3102c42c39439713138a2ec86.pdf
    • https://static.usrfiles.com/ugd/b8c837_75d5d82399a74aec98401ac42c2378e0.pdf
    • https://static.usrfiles.com/ugd/15cd4d_06c00bbf556c43e58f5f0a0e9ad18c9f.pdf
    • https://static.usrfiles.com/ugd/89c6ad_056ef6e94a0746fdbb3c64c2b05f7297.pdf
    • https://cdn.shopify.com/s/files/1/0459/9054/3519/files/x3_albion_prelude_litcubes_universe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1660/0227/files/75906077939.pdf
    • https://cdn.shopify.com/s/files/1/0429/7913/1551/files/83695538535.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/gynae_oncology_guidelines.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_off00006f64.bin
557c91abe4adca50c41e992f760cd060229b171f4f2b5d09d3ed383a4a9f4721
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 5100 bytes
font_01_sfnt_off000080cb.bin
5792e69cd013556a6e4ef12c0762e4adf4402aabe171bef26dae51399dcc6f35
pdf-font-stream PDF embedded font (sfnt) at offset 0x80CB 16400 bytes