Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66c736a4436ee09…

MALICIOUS

PDF

39.0 KB Created: 2020-08-22 11:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6276ddf7a2cae72c91d7f673d4fd9168 SHA-1: 6f21fe4a7a87a496bfaf38b3668024c84937b1ad SHA-256: f66c736a4436ee097d350e332fa72561717b0e69600c9c071ec810bd35b49ac4
120 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 of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary purpose is to direct users to malicious infrastructure.

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=saki+saki+re+audio+song
    • http://files.aaugymnasticsnationals.com/uploads/1/3/0/8/130813558/zezira.pdf
    • http://biwexoki.synergymedicines.com/uploads/1/3/2/6/132682787/kabivipoperuxubu.pdf
    • http://files.atlantadentalanesthesia.com/uploads/1/3/1/4/131455883/najikenusapijevofifu.pdf
    • http://jinabiras.linkwestapt.com/uploads/1/3/0/8/130874431/punovokosen-bizaviwibobe-gegizago.pdf
    • https://cdn.shopify.com/s/files/1/0450/6910/7352/files/background_for_easyworship_2009.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/53060023379.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/votopiseg.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/zubobiwixesofog.pdf
    • https://cdn.shopify.com/s/files/1/0453/6434/7035/files/45654061032.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/print_booklet_adobe_acrobat_pro.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/afshan_zaibi_all_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8155/files/67920629776.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/jipojexewuresomefegifet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/xuxipaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/jaxoguminezizenelawun.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_off0000529c.bin
c7d28f0c2cfeee6558484add041962029bb7b851d6ac2c290ad4e406ff7a8e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x529C 5128 bytes
font_01_sfnt_off0000640f.bin
6d11838e92248009b25304c3f2cf6c96f04e7452c06c19136387340164966000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 13648 bytes

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