Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f24107e896c9ff3…

MALICIOUS

PDF

33.7 KB Created: 2020-08-05 03:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: feee62f1727b979d9bda8202ada8f86b SHA-1: 89343cbedebfcd9c2e7730f84d608f25c351981b SHA-256: 1f24107e896c9ff34dc534941d6ef4f61fa10f4ee52493f5b0425f4196fc7783
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body and embedded links suggest a lure for users searching for PDF to Word conversion tools, aiming to redirect them to malicious infrastructure.

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=pasar+de+pdf+a+word+gratis+y+rapido+en+linea
    • http://vifudoroz.onyxts.com/uploads/1/3/2/7/132740214/7f26c8c8c6029.pdf
    • http://files.desmoinesmennonite.org/uploads/1/3/1/8/131857445/bupex-wajadano-jidituminom-lapuzowevor.pdf
    • http://files.bronamartin.org/uploads/1/3/1/0/131070146/d0f96bca02fb6.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/xebovakin.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/boule_de_suif_english.pdf
    • https://cdn.shopify.com/s/files/1/0445/6103/9524/files/acs_analytical_chemistry_exam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1479/1069/files/warefosoxowesit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/99489282466.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/luvutalanopijomakel.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/gawogetuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/3364/7525/files/37560293686.pdf
    • https://cdn.shopify.com/s/files/1/0431/2524/4053/files/osha_safety_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0648/files/how_to_check_your_coordinates_in_minecraft.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_off0000449d.bin
d99dbd4dfcbcbe5b2bedd6a648d296eecec1744d68c253af58d106fcbae8f709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x449D 5404 bytes
font_01_sfnt_off0000572a.bin
ef38e436181a53f1e4358491349209336533d5017fd3eaf2f0bc8165d85d4a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572A 10084 bytes

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