Malicious PDF — malware analysis report

Static analysis result for SHA-256 6127de42d9d06459…

MALICIOUS

PDF

39.2 KB Created: 2020-08-01 04:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbeae876ec419562897b36c9433ef55e SHA-1: 0aad4cfee85ae086cea2ce7385964d738d956e4c SHA-256: 6127de42d9d0645998ad25687933ec9f72fb623a8489e4717460678b9014e029
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=d%2526+d+5e+unearthed+arcana+pdf
    • http://files.tammyandtommytravel.com/uploads/1/3/1/6/131606396/busejanofenikom-xodadejilugu-pibidanufos.pdf
    • http://files.apparelfromhazy.com/uploads/1/3/1/4/131437123/waxivosimig-wetupex.pdf
    • http://files.quietlifemotel.com/uploads/1/3/0/7/130739348/0ea96eb269bc30.pdf
    • http://files.valeriaflorescano.net/uploads/1/3/1/4/131454106/fesizotogopoduf_fugopisivamu_dawivolokixi_kapopazare.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/56284723735.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/76403998296.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1034/files/litosiwas.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/kevin_gausman_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/pomepadogolebagazupan.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/bewisijometuwobekomose.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/86243678235.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/jidobubileradozan.pdf
    • https://cdn.shopify.com/s/files/1/0435/1347/9320/files/lekoxuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/40111349514.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/sinotarisojamuzegowebiz.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_off00005f47.bin
9253c4ec90eb8b217ae91b3aef6412788d3d1419415539c5cfb70110cf842fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F47 4156 bytes
font_01_sfnt_off00006d75.bin
a3da791f8a501c34f2eaab862c1d6454314fddeaf87011792a0304abfe159223
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D75 10456 bytes