Malicious PDF — malware analysis report

Static analysis result for SHA-256 63899e1b42725158…

MALICIOUS

PDF

129.0 KB Created: 2020-09-11 01:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aac19ce7197340e510ba39729d3548e SHA-1: d5e3bce7f207855bb0c6f1a9102c232b77598866 SHA-256: 63899e1b4272515824af94f52823ab627ab0500e24bede3c842c67e5daecd85a
202 Risk Score

Malware Insights

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

The PDF contains a lure related to unemployment insurance, combined with heuristics indicating it's a malicious redirector and part of a link farm. The embedded URL, https://ttraff.link/wix?keyword=texas+unemployment+insurance+wage+report+worksheet, is a primary indicator of malicious redirection. The ML classifier strongly flagged this PDF as malicious, supporting the overall assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.link/wix?keyword=texas+unemployment+insurance+wage+report+worksheet
    • http://files.lowcountrydressforsuccess.org/uploads/1/3/1/8/131860787/e911069092f6.pdf
    • http://files.ataraxiaphotography.com/uploads/1/3/1/4/131455883/jazozixure.pdf
    • http://files.annimorris.co.nz/uploads/1/3/0/7/130776611/b16f525ce.pdf
    • http://govil.sapir-forum.org/uploads/1/3/1/6/131606027/2050827.pdf
    • http://motozubex.phenixid.com/uploads/1/3/1/4/131453870/lemotosir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f5892c_648455a4f624467894e84d71ec31f2f2.pdf
    • https://static.usrfiles.com/ugd/0d089b_b4e7227e46dd47688a7e830a315c5f46.pdf
    • https://static.usrfiles.com/ugd/c8df25_96253d2c0f544c5facac49982cbda53b.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/dictionary_english_to_urdu_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/jixujid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/88823035893.pdf
    • https://cdn.shopify.com/s/files/1/0436/1660/0227/files/26556331264.pdf
    • https://cdn.shopify.com/s/files/1/0429/4243/1395/files/future_tense_will_shall_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/pomux.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/zozaji.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_off0001bd6f.bin
3a77a2dbc1facc40463fd4065be79cc922bf764107ab2c6912181d4c1a4ba18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD6F 5620 bytes
font_01_sfnt_off0001d080.bin
d25762fb56f4e6bc446cf2e474cc7c2dd1c6370bffcd0949d604b0d6160c168f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D080 10892 bytes

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