Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25a71710a42ddc3…

MALICIOUS

PDF

41.4 KB Created: 2020-09-03 06:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ed581972a549d68b5c33ea0df4559cc SHA-1: 607be40a94e784df57625373a69185f10d7d2247 SHA-256: f25a71710a42ddc3c64922424fbe28323dd47810b9f85bfa70421e83a15878c7
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link: User Execution

The PDF document contains invisible links that redirect to a URL associated with malicious redirector infrastructure. The document body and heuristics indicate a fake CAPTCHA or human verification prompt, designed to lure users into clicking the malicious link. The primary malicious URL identified is ttraff.ru, which is used in conjunction with SEO-themed PDF links.

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.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/pify?keyword=add+google+captcha+to+contact+form+7
    • https://static.usrfiles.com/ugd/3a38e0_21bdac4afbc64f77be6adc5342f0771e.pdf
    • https://static.usrfiles.com/ugd/8ebb60_e03b87aeb2c64256963f385580ba73ec.pdf
    • https://static.usrfiles.com/ugd/26938b_0da9ac9456a344e6b989db16893c04e5.pdf
    • https://static.usrfiles.com/ugd/2ac701_161d1d6cc3bc46f482b2d0295d1d7a45.pdf
    • https://static.usrfiles.com/ugd/7836c9_e38a4953f7b54be5a6941ec5b1d5069e.pdf
    • https://cdn.shopify.com/s/files/1/0430/8346/4855/files/cost_accounting_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0446/7880/7705/files/aladdin_full_story.pdf
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/betimitixuzijurixoparog.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9941/files/lagabadurotijotu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/74488893652.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/43477796119.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/18975767660.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4706/files/35962569755.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/89851171314.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/wenivixu.pdf
    • https://static.usrfiles.com/ugd/ccb1c6_f222f60a8b0d4d519bdaa4a1feb76913.pdf
    • https://static.usrfiles.com/ugd/b8c837_265a730817ca492ea2ea61f626ffaf0f.pdf
    • https://static.usrfiles.com/ugd/ad2ade_e93b5c0d18144bdb824e4fda0f123422.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_off000062a8.bin
bee16763ec6865120a799446897b874d16026e3c8d3646a4eec6c93c663ebba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 5460 bytes
font_01_sfnt_off0000751f.bin
4a4be4644b285b6c8cb886bd0a2f39d66c389d4972068cf4b3216f54791f08ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751F 10408 bytes

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