Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b3d4fc204d8ab3…

MALICIOUS

PDF

43.6 KB Created: 2020-08-24 23:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a41496f98bb8338de2814bf33ba34eee SHA-1: 3e1aaacb49022ee67ae2dd935e6a4f1320875982 SHA-256: 89b3d4fc204d8ab301c0f66a4a1e70cb1695ecb13a31ea0b48c515f018adc886
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=java+phoneky+gangstar+game'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious verdict. The document body contains garbled text but includes the suspicious URL.

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.ru/pify?keyword=java+phoneky+gangstar+game
    • http://sefome.cookhamrunningclub.com/uploads/1/3/0/8/130874482/c32be865958a64.pdf
    • http://soregod.hebrewespresso.com/uploads/1/3/1/6/131606122/3606134.pdf
    • http://files.margoheekin.com/uploads/1/3/0/7/130740530/musavutakifigi_pogabitefoboj.pdf
    • http://files.doodadsandtulle.com/uploads/1/3/1/0/131070526/xiwaxumuluwuna.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/zifuxetijimazisoreruxen.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/zuburusowisukaxojika.pdf
    • https://cdn.shopify.com/s/files/1/0428/6277/2391/files/5544329483.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/circulatory_system_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/97012445226.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/7428406088.pdf
    • https://cdn.shopify.com/s/files/1/0434/0468/9558/files/couchbase_vs_mongodb_vs_cassandra_performance.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/formal_dress_for_rent_melbourne.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/vosokopuja.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/5775182147.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/72447655276.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_off000055f4.bin
e345a2b26fc1dd29bc5efc1863e643a58eb2347ac11ca9c2d809ab9a0fe13443
pdf-font-stream PDF embedded font (sfnt) at offset 0x55F4 5156 bytes
font_01_sfnt_off00006751.bin
847a7b57542012d6944cf139743419f1113da66d08da480ad76f607ff8931b83
pdf-font-stream PDF embedded font (sfnt) at offset 0x6751 14132 bytes
font_02_sfnt_off0000938a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x938A 4324 bytes