Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1140ec1bb276b6…

MALICIOUS

PDF

43.6 KB Created: 2020-08-18 13:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0c10360c2a5b3df7455fe895569c0c SHA-1: 8ca765c65bc1fde278f370f18d0c180afdef921e SHA-256: 9d1140ec1bb276b620515dc70873690a6e4ecb2801627c0490ad0a798aa672dc
152 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely used to obscure the final destination of the malicious payload. Another critical heuristic indicates a PDF link farm, with 17 links pointing to external PDFs, many hosted on Shopify domains, suggesting an attempt at SEO manipulation or content distribution. The presence of multiple unknown URLs further supports the malicious nature of this document.

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=bangalore+road+map+free++pdf
    • http://mejuzevi.bbinteriorstyling.com/uploads/1/3/1/0/131069789/e56332f06e89e5b.pdf
    • http://files.kellymchugh.org/uploads/1/3/0/7/130775677/5520614.pdf
    • http://tilekof.nvclosedeals.com/uploads/1/3/1/4/131437987/4df79cab5b13b7.pdf
    • http://files.brookhollowwinery.com/uploads/1/3/0/7/130775429/dowetuwikukine_xuxuwo_jesanelujepabol_wumegereji.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/plant_cell_and_its_organelles.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/vector_tangente_normal_y_binormal_calculo_vectorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/3690/1527/files/91235090559.pdf
    • https://cdn.shopify.com/s/files/1/0432/2171/3060/files/declaration_de_chiffre_d_affaire_auto_entrepreneur_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/chicago_bibliography_citation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/gotewesuso.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/34905061058.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/death_after_life.pdf
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/fajaziwokubugiji.pdf
    • https://cdn.shopify.com/s/files/1/0436/9101/6347/files/futegevosirigi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/pip_application_form_scotland.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/same_meaning_words.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.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_off00006d55.bin
e73c0041a752a7580596881fdb41d35938920073abb95a8afb9c89bea76acb70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D55 5232 bytes
font_01_sfnt_off00007f0d.bin
4efd4d320e03408fd6f2eb11f55f9d123b4c82d5fd36f97db2dcda33fc675091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0D 9932 bytes

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