Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0bc7a7b1df8844…

MALICIOUS

PDF

34.4 KB Created: 2020-08-08 23:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 878f7c7940e8c7887c13342f10a166e9 SHA-1: a74c9151ed33721e96603750f87b4bb6ed3a7105 SHA-256: bd0bc7a7b1df88446f515e25407ffb82952271d1539be343f6d518cf94db92d7
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'bgcse past papers mathematics pdf' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. The presence of numerous links, including the malicious redirector, indicates a link farm or phishing attempt.

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.ru/pify?keyword=bgcse+past+papers+mathematics+pdf
    • http://files.angletonchoir.com/uploads/1/3/1/3/131380322/48642e7619.pdf
    • http://darutope.sandlakegoldens.com/uploads/1/3/2/6/132695663/xupogonisodanikig.pdf
    • http://files.laptopupcycle.org/uploads/1/3/1/4/131409442/6c42a.pdf
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/allen_biology_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/socom_16_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/derilepoxiginovojuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/blastomyces_dermatitidis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/vometa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/57153757352.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/79405276790.pdf
    • https://cdn.shopify.com/s/files/1/0434/2133/5702/files/wixijetavazel.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/19761153516.pdf
    • https://cdn.shopify.com/s/files/1/0432/6260/7520/files/18347581077.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/lomiferivewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3886/7607/files/68893554837.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_off0000477f.bin
a8f11b7645546aee7b05cd90053878de6eec5d6b37ac180c2a6c1fedcb95e919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x477F 5588 bytes
font_01_sfnt_off00005a5b.bin
0d9df17d27ff33e564a72952c16ed46f1a9ec5535101acc332dee6d80062db45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5B 10044 bytes

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