Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e9b975c2510cbe…

MALICIOUS

PDF

43.8 KB Created: 2020-08-08 02:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6af783babc2d7837e60216aa813d4a38 SHA-1: ea68b716afb7768f713fc9ae0e8264d20c946a54 SHA-256: f4e9b975c2510cbe03ae9e328dde123c88184714bb9e1519d66fdbf40a4b7422
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF documents, a technique often used for SEO poisoning or to host malicious content. One of the extracted URLs, 'https://ttraff.cc/pify?keyword=bus+interface+unit+of+8086+microprocessor+pdf', is identified as a malicious redirector. The document body itself is heavily obfuscated and contains references to the malicious URL and other benign-looking PDF links, suggesting a lure to download further malicious content or to engage in a phishing scheme.

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.cc/pify?keyword=bus+interface+unit+of+8086+microprocessor+pdf
    • http://files.mastercreatorsadventureretreat.com/uploads/1/3/1/4/131452733/nonalesem.pdf
    • http://files.unclerhetts.com/uploads/1/3/0/8/130814855/sanebegu-wexibasukokuk-tujabovaleki-tosekavironiti.pdf
    • http://files.zpchurch.org/uploads/1/3/1/4/131407469/kudefinugipozo-sebono-nurexipevo-vopudim.pdf
    • http://files.dawnfeeneyjewellery.co.uk/uploads/1/3/0/7/130738739/jotapovebub_zuxilinisaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9898/files/fe_mechanical_review_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/35232962104.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/automobile_engineering_syllabus_regulation_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/management_of_penetrating_abdominal_trauma.pdf
    • https://cdn.shopify.com/s/files/1/0430/4188/2265/files/43628335891.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/loruju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/wibavegef.pdf
    • https://cdn.shopify.com/s/files/1/0433/3653/2136/files/xavimite.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3382/files/xakazabizofiweresapomesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/lista_giocatori_fantacalcio_2020_20_fantagazzetta.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/pekaduvamaja.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_off00006be5.bin
0646fe9359f751afec4a3732a4656f1ac46d8c39997f9d8e0dd28677d65262fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 5808 bytes
font_01_sfnt_off00007f86.bin
f01314bbafc0e4263d0ced1702d5b1674556526627ebb97d6fe312e51f209a49
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F86 10240 bytes