Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd38248c3437b608…

MALICIOUS

PDF

60.8 KB Created: 2020-08-19 20:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 301f5a7f57fdfd0f23489f16f22c432d SHA-1: bafbe91c4c82d736cba2ac2579900ae1590e6109 SHA-256: bd38248c3437b6085035b53a8080463244c25f01b1ca95983f0e322d2e8d3099
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 infrastructure, ttraff.com, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, contains references to this redirector and numerous other URLs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to a 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.com/pify?keyword=cyndi+lauper+time+after+time+song
    • http://pedove.aspiraconsultancy.com/uploads/1/3/0/7/130739415/36b8e043e.pdf
    • http://nuwom.jadajadajadajada.com/uploads/1/3/2/8/132816066/ripib_jomisa_rujidujuji_gidava.pdf
    • http://files.dengkechen.com/uploads/1/3/2/6/132695213/a81cfb7cb23.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/fexorut.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/16895852171.pdf
    • https://cdn.shopify.com/s/files/1/0432/4468/3419/files/carol_of_the_bells_spartito_pianoforte.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/wooden_platform_king_bed_frame.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/51535471157.pdf
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/91173907317.pdf
    • https://cdn.shopify.com/s/files/1/0428/4986/1791/files/basic_logic_gates_and_truth_tables.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/muputepoxawanabitonimege.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/55332406889.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/nanelikoxofagexi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0361/6165/files/ccna_routing_and_switching_200_125_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/geometry_word_problems_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/soburiwadimebuwovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/buwewes.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_off0000a46a.bin
d8655820ef3f6073a64bf3a687997af8d1a2024aeb09442573dd227a121e0882		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46A 5368 bytes
font_01_sfnt_off0000b69f.bin
512a8d9883dd25fe6fce71d2ef87ffe56590bd836a1edc44054835f726c56bec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB69F 15676 bytes

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