Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a516a97e87eebeb…

MALICIOUS

PDF

41.1 KB Created: 2020-08-08 20:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 855d8fcf9303303af5b0fe59cb8abd9b SHA-1: 93e7d9cdb873fb0a2332d37fcfd92434315673f3 SHA-256: 8a516a97e87eebeb3524f7b00b3503b3a6128da019cdca272b607934168d34fc
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/wb?keyword=amazing%20grace%20my%20chains%20are%20gone%20chords%20in%20g%20pdf', likely leads to a malicious site. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the presence of the malicious redirector and the link farm indicates a phishing or redirection 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.ru/wb?keyword=amazing%20grace%20my%20chains%20are%20gone%20chords%20in%20g%20pdf
    • http://memiz.leadplasticsurgery.com/uploads/1/3/1/4/131407469/tavavoduru.pdf
    • http://files.kauaimusiceducation.org/uploads/1/3/1/3/131380063/bisunozowok_bakagab.pdf
    • http://files.guerrillazoo.com/uploads/1/3/0/7/130739616/5761426.pdf
    • http://lamuwasup.risingintoradiance.com/uploads/1/3/1/0/131069934/7e5301ba4754425.pdf
    • http://files.yacfoundation.org/uploads/1/3/1/3/131383398/relili_mupixolala_gofowekoxuzel.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/vaxatom.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/67474761884.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/jalavunufotipedozitaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/54327791981.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/momupiriwufiburipobanota.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/73871611824.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7746/files/pebenapupujesa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/57259275130.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/zagumodidujarewixaguparuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/wevifemiwaxamojorasuges.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/crioterapia_espasticidad.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/54383184249.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/4827581423.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/50012330935.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_off000055a0.bin
de63aef058e1628392ba764b802b2045dbc51dac110567c6c713da5499e373d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x55A0 5680 bytes
font_01_sfnt_off000068e0.bin
214b7c5b04a0c65c36913bffc3f8aa4b0bf408567d2168a2f4f5eac019c16f8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E0 14200 bytes