Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a245fd704f3de23…

MALICIOUS

PDF

43.5 KB Created: 2020-07-09 19:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6670dfb79621c3acd39e6dac0bb4f762 SHA-1: 017f429905ac2c4a67401e0133e335a9e0d6b22c SHA-256: 8a245fd704f3de23beb8cb49583aa7387763ec1972bf2b8e5f2622ddeb174568
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious websites. One of the links points to known malicious redirector infrastructure. The document body itself is heavily obfuscated but contains references to the document title and the tool used for its creation, wkhtmltopdf.

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/wb?keyword=tratado%20de%20guadalupe%20hidalgo%201848%20pdf
    • http://files.knozeythetraveler.com/uploads/1/3/1/6/131607522/2d6be5f2999c28c.pdf
    • http://files.prepacademysanangelo.com/uploads/1/3/0/7/130775341/pigeguwifevutobo.pdf
    • http://files.mustbefrenchies.com/uploads/1/3/1/1/131164311/8082475.pdf
    • http://files.counsellingwithnaomi.com/uploads/1/3/2/7/132741555/vepude_vijukurexu.pdf
    • http://files.oklahomaliteracy.org/uploads/1/3/1/6/131606144/775ea32c1.pdf
    • http://files.stefanomitrione.org/uploads/1/3/1/4/131438299/xixozikelata.pdf
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/4/131483253/9062675.pdf
    • http://files.gbnfootball.com/uploads/1/3/1/6/131607889/5463197.pdf
    • http://files.ironhawkelevator.com/uploads/1/3/1/4/131438299/816983.pdf
    • http://files.artographicexplorations.com/uploads/1/3/1/8/131871677/4499f.pdf
    • http://files.milesjacoby.com/uploads/1/3/1/4/131453917/pubogilovevopa.pdf
    • https://tasanisan.files.wordpress.com/2020/07/61673245462.pdf
    • https://xowesavuwemu.files.wordpress.com/2020/06/115347416.pdf
    • https://larifite.files.wordpress.com/2020/06/mafinutava.pdf
    • https://bimirofi.files.wordpress.com/2020/06/71719405757.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90209356055.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nawujumukupuzuwoxelojoses.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejozetopugewafapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.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_off000069d5.bin
b690de75cdc2885e18fd363e220b0f0d18785a77ae09f32452a25bb4215aa4b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D5 5184 bytes
font_01_sfnt_off00007b96.bin
f506442879009201b8d3235f2115af792f834289c1e23ae5171d307557ff3384
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B96 10800 bytes