Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02af3d5e20f17e8…

MALICIOUS

PDF

63.4 KB Created: 2020-08-03 18:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58857146ae1d08bb63e6628728548c34 SHA-1: eceb499af729ff626e09c2c6b360a6b13823f3af SHA-256: a02af3d5e20f17e8ecf482fd2f1aa2ee6c16c343d63efbfa9c587e8a5ecb131d
120 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=cds+2020+2nd+paper+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted, and the PDF structure itself is the vector for the attack.

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=cds+2020+2nd+paper+pdf
    • http://files.bellinfischer.de/uploads/1/3/0/8/130814329/8adc0e.pdf
    • http://files.oakwindhoa.com/uploads/1/3/2/6/132681698/502251708.pdf
    • http://files.gildenlodge.com/uploads/1/3/0/7/130775046/jupuwafavuki-pibem.pdf
    • http://files.kaydelynnphotography.com/uploads/1/3/0/7/130775286/koripelarupefobes.pdf
    • https://cdn.shopify.com/s/files/1/0437/0569/6409/files/68539844178.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/gixopofozidonok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0438/9617/6795/files/pejusazijofeminoxetade.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/sekotabewunujifas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/waguxajevuvudigaduzumibin.pdf
    • https://cdn.shopify.com/s/files/1/0434/9093/4949/files/tebipabixironeroneladig.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0510/files/42334851489.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34456372212.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/10802117662.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/kissmanga_one_piece.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/lock_and_key_sarah_dessen.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_off0000ba08.bin
ea94af440c5f118f8fe81238e3d593e39a9873b25c0b4c361d1bf8044da38fa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA08 5180 bytes
font_01_sfnt_off0000cbb1.bin
41fb186730ca28709cc2d81dea8a74eaaafa8ac4b090e596c7fff4eda4a31ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB1 10864 bytes

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