Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40d7685bdcc148f…

MALICIOUS

PDF

49.2 KB Created: 2020-08-28 07:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b2edce92dfaec8ea5142a7919faf84a SHA-1: 587787e8745d2bb8661a7aad457efaf82b5cd12a SHA-256: a40d7685bdcc148fb6ddd22914ba5b0ee1605c072691411833224d9be95a97fd
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to a psychological interview and includes the malicious URL. This suggests a phishing or malware delivery attempt. No scripts were extracted from this sample.

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.link/pify?keyword=entrevista+psicologica+ejemplo+escrito
    • http://files.davidteagueentertainment.com/uploads/1/3/0/8/130874224/genodevepe_mazovubaf_xavugoxafilakom.pdf
    • http://files.weekendinquest.org/uploads/1/3/1/4/131437005/siduzamelofubaf_tiruwedurutu_tadodimomivo_siparexenovewis.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/19449036274.pdf
    • https://cdn.shopify.com/s/files/1/0439/1573/9304/files/flat_sale_agreement_format.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/posowikajaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5613/6341/files/29792147970.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/new_leaf_redd_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/bejezuxalopafibat.pdf
    • https://cdn.shopify.com/s/files/1/0438/3873/4496/files/xunawirelosowimepasupanu.pdf
    • https://cdn.shopify.com/s/files/1/0463/5607/0561/files/popigufan.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/balebederimezabobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/the_bedford_reader_13th_edition_free_download.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_off00007e87.bin
4aaf847b99a00b21a966da6be8fed58ec6ff3e00aa2ff3533e67847310e1bd83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E87 5348 bytes
font_01_sfnt_off000090b0.bin
6d6d88ec0a5f90ae34c11c7ce3c413bcb7b3a7753cacf7ccdf869d94fe1af08f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B0 11800 bytes

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