Malicious PDF — malware analysis report

Static analysis result for SHA-256 119480e662dba08a…

MALICIOUS

PDF

41.7 KB Created: 2020-09-01 01:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2e4c9facfb2ae1a3fe99c6111a2175a SHA-1: 43520ed566973de8227a931e4d103505db1b2ed8 SHA-256: 119480e662dba08a1434ca1f16e7a7a069589ded2abd2e1791660cd8dbcf8638
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. A primary link directs to 'ttraff.ru', identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, indicating an attempt to lure users to this malicious site. 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=transforming+domain+and+range+worksheet+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/8377/4614/files/67582581146.pdf
    • https://cdn.shopify.com/s/files/1/0463/1976/3618/files/17623214949.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/purebefopiremotagiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/anticoagulants_in_hematology.pdf
    • https://cdn.shopify.com/s/files/1/0433/9364/6753/files/income_statement_template_monthly.pdf
    • https://static.usrfiles.com/ugd/6cf392_e6c64b3d7f454c03b446f9e47215a476.pdf
    • https://static.usrfiles.com/ugd/2ddd39_a669d35a111a4943bdb2a804efeed162.pdf
    • https://static.usrfiles.com/ugd/89c6ad_f57bda7adb74444ba8b181f0fc7280e4.pdf
    • https://static.usrfiles.com/ugd/7c3584_f833102d8b6c424c9176683d155bacd7.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/daily_guided_meditation_podcast.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/bixir.pdf
    • https://static.usrfiles.com/ugd/e2c250_fe11dbd3558a47cc8ca78ce1cb43842e.pdf
    • https://static.usrfiles.com/ugd/b8c837_66510327cdb34ea39dd840bf1933f4ff.pdf
    • https://static.usrfiles.com/ugd/7198c1_734b7a7f7eab4f8d99dc90082421b0ca.pdf
    • https://static.usrfiles.com/ugd/e6092c_2721243babc94fea96d81289924fe52f.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_off0000650e.bin
92dacbf6c70bf76411d9fdaa4e48c44d445cae1b7b8d3b5664db324af1c608ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 5396 bytes
font_01_sfnt_off00007750.bin
fe44a9f4fbcab7170eab3992e43a3715e1feac0b5b91e150efa8d0d0419bfcc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7750 10112 bytes