Malicious PDF — malware analysis report

Static analysis result for SHA-256 58beb2858cfd7038…

MALICIOUS

PDF

52.0 KB Created: 2020-08-30 05:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 301ac6f086f61f37e84dceee7af3c02d SHA-1: 3ed7ec45c82690694f5cecbf62de01727657a22a SHA-256: 58beb2858cfd7038bbbfe3afd1891003797b7d107ab7394d368edb282561bba9
152 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, which is used to lure users with search-related keywords. Additionally, the PDF exhibits a mass external PDF link farm, with many links pointing to Shopify and static.usrfiles.com domains, suggesting a SEO-based distribution tactic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=meditation+techniques+in+hindi+pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/xizabewavobama.pdf
    • https://cdn.shopify.com/s/files/1/0429/7107/0617/files/dokukuvodafubulutumulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/fell_in_love_with_a_girl_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/business_administration_and_management.pdf
    • https://static.usrfiles.com/ugd/353d00_ffbd80eb5385459bac8d85b04b331184.pdf
    • https://static.usrfiles.com/ugd/3f4b99_12e5281936a24b959ab65dcf50932e25.pdf
    • https://static.usrfiles.com/ugd/b8c837_d090bb308f51431c84846676e81c1668.pdf
    • https://static.usrfiles.com/ugd/3f0e57_0192092ac6074ed49a8df227d3679ed3.pdf
    • https://static.usrfiles.com/ugd/b13fd1_1d8169fb2e4c47e69484c6b3e7aacd29.pdf
    • https://static.usrfiles.com/ugd/409ca8_048fa53c5259417c9e751fd62ddc88af.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e56b2ce15c044e99ac8fe15d1b72301.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e74.bin
2e0449b71165cabad976d41cc07e9a25e30d64418cc918af8a8786c5bc39c9d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E74 5248 bytes
font_01_sfnt_off00008055.bin
dd9ff0317e8bea7b168a1a5f9ea85c8a565633389a7ed0002600643782f52c9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8055 14508 bytes
font_02_sfnt_off0000acee.bin
b3d8ba45b0efc1d30e951b6baa126f01fa0119a3f718faf3db67c50d9ef25104
pdf-font-stream PDF embedded font (sfnt) at offset 0xACEE 6248 bytes