Malicious PDF — malware analysis report

Static analysis result for SHA-256 c166838dffbb4f53…

MALICIOUS

PDF

43.9 KB Created: 2020-07-29 06:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3a0534dee31a0304e6a1601d23a5ea4 SHA-1: 44b1777233832a4a42d00e2a87f6b8d7200b0ec7 SHA-256: c166838dffbb4f53b5eab060caf61f55db371816fd63d1e3c3e34e97741bc413
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm designed to attract traffic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing users to malicious infrastructure via these links.

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.com/pify?keyword=challenger+school+uniform+store+san+jose
    • http://files.basicambition.com/uploads/1/3/0/7/130739308/tuvubok.pdf
    • http://files.arlenegersonphd.com/uploads/1/3/1/0/131070171/zasamuw_fefegipela_rikimixo.pdf
    • http://files.teachingcolumbus.org/uploads/1/3/0/7/130738566/623e05e369.pdf
    • http://files.longcrendonfilmclub.com/uploads/1/3/2/7/132740905/zizeninuminezi.pdf
    • http://files.achievemediation.com/uploads/1/3/1/4/131438459/4166d.pdf
    • http://files.longcrendonfilmclub.com/uploads/1/3/2/7
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/949986333.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/fososigewawuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/midalibiket.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/zojagelopikaxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/18681508694.pdf
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/gixeletupegomolu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/5904978971.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/gideripeloduze.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/17863383719.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/32296312365.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/kuzeredabiretokutoki.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_off00006f35.bin
691f83bf920c4a2d3501105816a0d9892f7d6fb9a5e7ac9fdcd4e178b5dbacbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F35 5276 bytes
font_01_sfnt_off000080fb.bin
32ad9144899863304bb51d37c6f1936a0458c675af3d1e41c2725897cd37e6ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FB 9796 bytes

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