Malicious PDF — malware analysis report

Static analysis result for SHA-256 e866cdb5b957dbd5…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 00:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d7602ff00ced62455c7df5fb50509da SHA-1: 063fbab4e585c5790904432622c5f8be993e26d8 SHA-256: e866cdb5b957dbd502db3231d4459ca43a1a1749e82c6904876fdab853fc5297
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious URL is https://ttraff.cc/pify?keyword=buffalo+wild+wings+nutrition+info+pdf, which is likely used to redirect the user to a malicious site. No scripts were extracted, limiting the analysis of specific behaviors.

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/pify?keyword=buffalo+wild+wings+nutrition+info+pdf
    • http://files.fallcityarts.com/uploads/1/3/1/0/131069906/nalosubuxusofofeta.pdf
    • http://files.regalimagegermanshepherds.com/uploads/1/3/1/4/131483201/2318962.pdf
    • http://kuxoz.ayeeprettyblack.com/uploads/1/3/1/4/131453247/xutiwolan-sarebitimap-nibirev-demud.pdf
    • http://files.oursilentprincess.com/uploads/1/3/2/6/132681559/765fa519e1fa7.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/doobie_brothers_another_park_another_sunday.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/79522079994.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5263/files/public_finance_regulations_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3791/files/histoire_cheikh_ahmadou_bamba.pdf
    • https://cdn.shopify.com/s/files/1/0435/6512/1695/files/comment_fusionner_plusieurs_avec_foxit_reader.pdf
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/29029191486.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/materia_organica_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7162/files/keduloruv.pdf
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/63077298738.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7423/files/sugukal.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/23841023473.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/no_condemnation_a_theology_of_assurance_of_salvation.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/naturosumevomunivolar.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_off00006a1a.bin
4f23097b77a2ce9840eed07e860e04d969beeab5a066911888c042ae8b943d78
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1A 5348 bytes
font_01_sfnt_off00007c73.bin
e3dcdf7d459f585eadd16d979d29e2c52dc14abf087b2876dff76d4b2f1319f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C73 10800 bytes