Malicious PDF — malware analysis report

Static analysis result for SHA-256 26aca7cb86531e95…

MALICIOUS

PDF

45.6 KB Created: 2020-08-05 11:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5f401c6ffe121fd5ad5b6b0c4bb115a SHA-1: e252a9ac15df0ad1294a9cb789c566f774d700b4 SHA-256: 26aca7cb86531e958cb15f6e10599e8bf6c3b929415e2c753ba4aba694690c1c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a software serial key, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm, suggesting an attempt to manipulate search engine results or distribute content widely. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=verypdf+pdf+to+word+ocr+converter+serial+key
    • http://files.redbridgebuilders.com/uploads/1/3/2/8/132814593/e8a658.pdf
    • http://dijazuwef.koreanamericanhealthcoalition.com/uploads/1/3/0/8/130873951/a6e5cd.pdf
    • http://files.jimmyslawnsprinklers.com/uploads/1/3/0/9/130969712/kasajagex-kusodirebox-tiratok.pdf
    • http://files.swamiseva.org/uploads/1/3/1/6/131637385/vutelefabebot.pdf
    • http://files.allisontierney.com/uploads/1/3/1/4/131407148/7257703.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/42715608710.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/93781009409.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/fonesifowutidepovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/14228533649.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/sasulugatotaxamubok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/jeturev.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/26533822031.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/58407207289.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/48888277493.pdf
    • https://cdn.shopify.com/s/files/1/0434/4902/4679/files/bg_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0434/5557/8273/files/60984514605.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/wafj_job_board.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_off00007319.bin
85847606c2f7b335824a8e8fe6800062afb6afd86a08e00e77e6496503e10c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7319 5432 bytes
font_01_sfnt_off000085ca.bin
91d3c26002cd11a90c2bbbc0cc18c3831da38e863eb60cbe39cf75e0138bd5cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CA 10316 bytes

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