Malicious PDF — malware analysis report

Static analysis result for SHA-256 f646e5ffd252c7de…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 19:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9701b1c998d7dc2671660ce50dd66cbc SHA-1: 32f9c611ae4f01e5205521e2adcf168fd7d1aa1b SHA-256: f646e5ffd252c7de7d2e30e905501d297b893f54271f83d113c4e4ba234db565
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to benign Shopify-hosted PDFs, likely as a camouflage technique. No scripts were extracted from this sample.

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=contact+dermatitis+patient+education+pdf
    • http://files.lauratofarides.co.uk/uploads/1/3/1/3/131397955/5083137.pdf
    • http://files.lighthouse100ultra.com/uploads/1/3/1/3/131382078/d27c9.pdf
    • http://files.barbarawirthart.com/uploads/1/3/1/4/131453007/xepakekeg.pdf
    • http://files.dayafoundation.org/uploads/1/3/0/8/130874180/9678481.pdf
    • https://cdn.shopify.com/s/files/1/0452/3776/4256/files/centrales_solares_termicas.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/23271270423.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/bu_kek_siansu_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/jafelisiximosuwarokar.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/understanding_by_design_professional_development_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/collapse_of_the_malolos_republic.pdf
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/sigmund_freud_books.pdf
    • https://cdn.shopify.com/s/files/1/0435/5175/2344/files/67477199339.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/buxisi.pdf
    • https://cdn.shopify.com/s/files/1/0454/0645/3928/files/etiologia_de_la_enfermedad_periodontal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/16331742627.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/fusatovowavavojiladufif.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/nudarisanavenutu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8497/0152/files/ginnie_mae_fha_guidelines.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_off0000714a.bin
e193d713440457776c644806c2ae0911cac0f85893123d29b8ca87ba27849c71
pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 5172 bytes
font_01_sfnt_off000082be.bin
5114f4f19b363952b25e015e2bc523c5c9f7cca7c7a5061fffc265b86f9d7374
pdf-font-stream PDF embedded font (sfnt) at offset 0x82BE 9780 bytes