Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a374869e587a80…

MALICIOUS

PDF

44.1 KB Created: 2020-08-12 13:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 454a6b5acce79934272d43dcf0a0404a SHA-1: 4f21da00eea18eb2f967c46cd3596c6e6c1033aa SHA-256: c4a374869e587a80c41b099d9fe96794d045cc9a54daf0c167b91a9c1a556a5d
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=cambridge+primary+english+activity+book+5+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://cdn.shopify.com/s/files/1/0429/3397/7255/files/31103223222.pdf'. The document body, though partially corrupted, contains text suggesting an educational context, which is likely a lure to encourage clicks on the malicious links.

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=cambridge+primary+english+activity+book+5+pdf
    • http://files.kmaysphotography.com/uploads/1/3/0/7/130776111/linarunasodil.pdf
    • http://bamufogez.logancohumane.com/uploads/1/3/1/3/131382486/segedufobujosog.pdf
    • http://files.ansomproductions.com/uploads/1/3/1/4/131454850/7100536.pdf
    • http://files.wettexttees.com/uploads/1/3/2/6/132696113/4952185.pdf
    • http://files.jmichaelmiller.org/uploads/1/3/0/7/130739719/50db7.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/31103223222.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/19836622924.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7805/files/garigobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/antibiotics_chemistry_project.pdf
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/vowikejekemagipezisaxu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8905/0265/files/barriers_to_entrepreneurship_in_zimbabwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0439/6072/9758/files/what_does_doki_mean.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/24385697525.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5055/files/xujod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/referurobuxofusitojukivid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000546c.bin
32b5ab879a71923f0a3527b100c27186b5b8cfa5898e299243233ed436867f62
pdf-font-stream PDF embedded font (sfnt) at offset 0x546C 5964 bytes
font_01_sfnt_off0000689f.bin
9c46fbcd11d70f5d0156967370e3a2c8e11e59b4428e08957ed479d389bbe15a
pdf-font-stream PDF embedded font (sfnt) at offset 0x689F 9924 bytes
font_02_sfnt_off00008ace.bin
807fee246959eb360fbe5b4f9e78daa504b8d9404397f41c68f209ae7dda103d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACE 16964 bytes