Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bbf2438cd41abf…

MALICIOUS

PDF

46.9 KB Created: 2020-08-06 20:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a18b1f3b6301dbcbb38905ff5ae61e07 SHA-1: c2ff590ba507d45456508c20f28635f478632d31 SHA-256: d8bbf2438cd41abfc853875a05ff449d900a16c4d7c0fabb26906dd14694bbfc
128 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 pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at ttraff.ru. This indicates a link farm or redirection scheme designed to distribute malicious content or phish users. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=articulos+cientificos+pdf+quimica
    • http://files.chriskellylandscapes.com/uploads/1/3/0/7/130775677/dumebabijeroko.pdf
    • http://files.abs-lao.com/uploads/1/3/1/8/131871909/galapo.pdf
    • http://files.ukassignments.net/uploads/1/3/1/3/131379420/guvozuletazimixexun.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/xeledijiweweluw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/2488119379.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/las_clases_sociales_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/46869426399.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/alimentao_escolar_saudavel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2961/files/52804866599.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/zekiketavilatijafubire.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/19664008786.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/irithyll_dungeon_key.pdf
    • https://cdn.shopify.com/s/files/1/0450/4364/6614/files/types_of_biomedical_waste.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7894/files/14101341554.pdf
    • https://cdn.shopify.com/s/files/1/0431/8045/8144/files/gudotubawenomuzis.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_off000077d2.bin
141d8937b21d7ce4e49da52713c191d40aae99b65ab6decc8eac51ba1a0200d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D2 5416 bytes
font_01_sfnt_off00008a25.bin
a8de75da548dc24b1c034e52b5403ffc0f2746390942259af2cef6216e07ce56
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A25 11304 bytes