Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec33bc59bcf9ebc…

MALICIOUS

PDF

40.0 KB Created: 2020-09-05 00:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cac7be323814855c624e9201ea15cde0 SHA-1: 9a1f1fce227f979a10cef628e9d50f598c6b7e11 SHA-256: bec33bc59bcf9ebc54a2c2c0085efdf7d4a748d36d75c75234e68979d8026c4f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.club/wix?keyword=transunion+cibil+industry+insights+report+2019`. This URL is likely part of a phishing campaign, attempting to trick users into believing they are accessing a legitimate report. The document body also contains this URL and numerous other links to PDF files hosted on `static.usrfiles.com`, suggesting a link farm designed to obscure the malicious destination.

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=transunion+cibil+industry+insights+report+2019
    • https://static.usrfiles.com/ugd/805d2a_f9a919a06677432a8ac4bd7ca52b7429.pdf
    • https://static.usrfiles.com/ugd/3cb679_b7c9c163e5704c02b852f2600ba08227.pdf
    • https://static.usrfiles.com/ugd/078c79_9f4bb646148446f59f2f53e647a21aae.pdf
    • https://static.usrfiles.com/ugd/02beb7_d884fcec8cb0477a90717168ef3bd8a2.pdf
    • https://static.usrfiles.com/ugd/576447_a0edbf597140485f8ef178f728634da1.pdf
    • https://static.usrfiles.com/ugd/db1da1_9124cfb98fae4347a3a72e04fb1f7009.pdf
    • https://static.usrfiles.com/ugd/625844_8b6256d0421b493fac415799ff0192fc.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_efc5ceebaa1a42b28a8e28b7b2c25193.pdf
    • https://static.usrfiles.com/ugd/f63f29_7d90bb26363e477eb172d7da06b14d39.pdf
    • https://static.usrfiles.com/ugd/f84671_56c27276c8dd4eb5bc0f8675b0be1e8f.pdf
    • https://static.usrfiles.com/ugd/90423f_1f0bc6c053cd487db075fddd4fb12b63.pdf
    • https://static.usrfiles.com/ugd/23e9be_90a065ffb1564d7bb981ef7c1b75ee32.pdf
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/lignocellulosic_materials.pdf
    • https://cdn.shopify.com/s/files/1/0469/0273/9106/files/divinity_original_sin_2_source_vampi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/vewun.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_off00005c7a.bin
9d007544dba467658f20b464d03b6f442c01e6168bc09468dad6d8bb1efc2d20
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7A 6008 bytes
font_01_sfnt_off000070e3.bin
6db1a429fe575a42c7f430079a764405824838a09f6833d0cea500a1405344e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E3 10028 bytes