Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25da05fb651b23e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-12 11:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d48ea657cbdcb5ad55339d03a2f138c SHA-1: ece5d8195a19a38b4fca0004eece5c102bb00b0c SHA-256: a25da05fb651b23ea9c4666f755c08f495481fc1a783c6f11135bbd65fbd1b53
150 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 Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One of these links, however, redirects to `ttraff.cc`, which is flagged as malicious redirector infrastructure. The document body itself is heavily obfuscated but contains the malicious URL. The primary attack pattern appears to be luring users to malicious content via a deceptive link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sindrome%20de%20glanzmann%20pdf
    • http://bebexo.stephaniestevensjewellery.co.uk/uploads/1/3/1/4/131437940/zoligexevinin_javodo_tazoli_pafakavep.pdf
    • http://files.ldp-rocketry.com/uploads/1/3/0/8/130814245/3812311.pdf
    • http://jurixade.nckpackaging.com/uploads/1/3/1/4/131407057/ca9bab89df3c.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1968/files/tukuripuve.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/zuwabelawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/moreluliwifigaludexab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/rinomapimafup.pdf
    • https://cdn.shopify.com/s/files/1/0430/8877/3269/files/nodedabivulatekezinurene.pdf
    • https://cdn.shopify.com/s/files/1/0438/4319/0946/files/accounting_information_systems_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/algorithme_matrice_exercice_corrig.pdf
    • https://cdn.shopify.com/s/files/1/0434/6272/1688/files/81398660108.pdf
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/electronic_signature_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/42161715522.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/wumuloji.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/tadona.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/99072312545.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/
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/electronic_signature_free_online

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ecc.bin
95c7d77ea0d4be8dde67d031cb60a9da41d15ddea949d979f773bace3eb60075
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECC 5044 bytes
font_01_sfnt_off00006fcd.bin
ed35d074d56a318e191ebd58b995e532491ea4cb4bf4182cf308b408a97be88c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 10176 bytes
font_02_sfnt_off00009264.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9264 4324 bytes