Malicious PDF — malware analysis report

Static analysis result for SHA-256 88bfa252d723f82f…

MALICIOUS

PDF

44.5 KB Created: 2020-09-01 03:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca89563a83f04bd8b221665d77c6f342 SHA-1: 6d1063615b046f55f9e0aefb627d7a4a6608bbca SHA-256: 88bfa252d723f82f25f727712340c03f9370e80092fd8750143309e8718429ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=jenks+lake+fishing+report+2019', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a fishing report, suggesting a lure. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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.ru/wix?keyword=jenks+lake+fishing+report+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/koilkuntla_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/88470461402.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/2979123971.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/thermo_king_code_63.pdf
    • https://static.usrfiles.com/ugd/de3d83_3b2f766150664c6a94621a7fba2182ce.pdf
    • https://static.usrfiles.com/ugd/32acb1_606b4ab789814dd2bbdf5236f2b8e732.pdf
    • https://static.usrfiles.com/ugd/934fc3_89076706df21469bba366ca61bb03986.pdf
    • https://static.usrfiles.com/ugd/b8c837_40d1519768de4423a4f0c07f2cd1766f.pdf
    • https://static.usrfiles.com/ugd/b7ed05_b8f0e9e6df734d2c8786505874e13161.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/algebra_equations_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/9674/2815/files/tewejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/nitrogen_generator_how_it_works.pdf
    • https://cdn.shopify.com/s/files/1/0439/4903/1592/files/free_beer_tap_vector.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/toshiba_projector_television.pdf
    • https://cdn.shopify.com/s/files/1/0438/9430/9019/files/naweberifekozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/66110869238.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e1f.bin
fb98561cb960ffd8445e144d842456707cb3161f0bfe20ed8ae087ca3cc23019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1F 5696 bytes
font_01_sfnt_off00008185.bin
1d932841faf6b5e936bc643ca1ea87755b032e04c4f5b0fd90569c34a7a29f34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8185 10392 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.