Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c807174c41800d…

MALICIOUS

PDF

56.4 KB Created: 2020-08-08 19:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f3df2c3cd5dc689d5b3209c1389c329 SHA-1: 4f32b5a29c49a88e2dd9220af9dc86b01c371adf SHA-256: 57c807174c41800d99f4ed1a3612990792461cfacb57747df7fbb7053560f39a
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link redirecting to a known malicious domain. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bearing+wall+system+pdf', indicating a lure to a potentially malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to manipulate search engine results or distribute malicious content.

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/pify?keyword=bearing+wall+system+pdf
    • http://files.amurielyoga.com/uploads/1/3/1/0/131070207/tosugaxowe-bokuwekob-motaradagiko.pdf
    • http://files.teramai-in-hampshire.com/uploads/1/3/1/4/131438437/78b656a.pdf
    • http://pozak.edgeofhell.com/uploads/1/3/1/4/131438137/8024136.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/abbyy_transformer_plus_serial_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/libibe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/jafiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1641/3607/files/56305881426.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/fobuledapafewugumatuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/43667493994.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/98784134735.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/nabufewaniwegatepivovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5274/files/11599040986.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/77996456775.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/nupalajanovefowa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3437/6352/files/baseband_transmission_and_broadband_transmission.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_off0000900b.bin
faf34c5c1ddd8fb08d561d2ec842596c5b12a290051abe3b83f3003c27f831a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x900B 5284 bytes
font_01_sfnt_off0000a1fc.bin
f47298a3dd232eb314ac828ca7c7c539bc02f347d56467b61f5813c73b05bf3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1FC 10980 bytes
font_02_sfnt_off0000c6ca.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CA 4324 bytes