Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ae0ca568d1449e…

MALICIOUS

PDF

40.2 KB Created: 2020-08-31 14:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca463f0ea0366f59e2a5975168b1e42f SHA-1: c07b525e7a9e4f250bde1abaeed8285d10dc86b2 SHA-256: 28ae0ca568d1449ef29fe33f5b31bcd7835496fbd3fe02632ed6e9a5f24726c4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL being https://ttraff.cc/pify?keyword=lawrence+cager+injury+report. This heuristic firing indicates a link farm designed to redirect users to malicious infrastructure. 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.cc/pify?keyword=lawrence+cager+injury+report
    • https://static.usrfiles.com/ugd/0baf77_9a2e327254b743fca606836c4c1b3c2e.pdf
    • https://static.usrfiles.com/ugd/9c43ec_a417af6fb1704fd8a25e60d250d1d3bf.pdf
    • https://static.usrfiles.com/ugd/0a052f_b94076aea99d40f782470b2a270501ca.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_91c60c734e00400094ebe4a3e0f096ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_58cb417fc5a44158927dfaadcf54042e.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb41f20180e6413098396a9da2b9956c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51eb82ffb154d6ea71517379899237c.pdf
    • https://static.usrfiles.com/ugd/34ec99_5a7ae6aba7b440eaaa41ad6ef8d5b4cf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3421/files/tratamiento_de_blastocystis_hominis.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/70727665023.pdf
    • https://static.usrfiles.com/ugd/5e81b9_9ad80d53e0524eed8b5f8fce1d791166.pdf
    • https://static.usrfiles.com/ugd/bae363_d6c0f6c06eaf47fb89d3b9e7c85c734f.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_off00005fa4.bin
1955d59dfd4a42ad1b4ada6cfbfbfbec5f3a6520a9f271dea6955e70fe3e3c72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA4 5104 bytes
font_01_sfnt_off00007132.bin
002b26d22802cc7f04a0c753afc494c12cda5042560d25387e0aa1b74de76f4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7132 10356 bytes

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