Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d460149f082b8e…

MALICIOUS

PDF

40.8 KB Created: 2020-09-12 00:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcaf26f814f27f0f6802b0533573c307 SHA-1: efed347f2355c82c028707261dee2bb7aa7726e6 SHA-256: 90d460149f082b8ee9813bab4ce919ef04f7cb02d45e5a6695a3c7067af6f826
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL, suggesting a lure to a malicious site. The primary attack pattern involves SEO link farming and redirecting users to potentially harmful content.

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.me/wix?keyword=ajax+form+field+data
    • http://tosekedik.crypto-decrypted.com/uploads/1/3/0/7/130739366/3780770.pdf
    • http://kunox.richlandcountydemocrats.com/uploads/1/3/2/6/132682787/puduz-verupifonese-newutafif.pdf
    • http://files.petraviam.com/uploads/1/3/0/7/130775633/1947d614eed8612.pdf
    • http://files.michelepetersonart.com/uploads/1/3/0/7/130775286/136576.pdf
    • http://jajutojeg.hackneykeepournhspublic.org/uploads/1/3/1/6/131637354/8b0b0a2.pdf
    • https://cdn.shopify.com/s/files/1/0483/9440/3998/files/konica_minolta_bizhub_c220_manual.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/poemas_de_amor_gustavo_adolfo_becquer.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/got_season_2_episode_1_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/1840/1430/files/bosquejos_evangelisticos.pdf
    • https://static.usrfiles.com/ugd/7aabb2_31d9bdf192ce4ce2a3f4e74b03b4e123.pdf
    • https://static.usrfiles.com/ugd/bc84a3_eb7f7398674d48a8a67847f01ed77637.pdf
    • https://static.usrfiles.com/ugd/9ea91e_cabc3b63ff014afaaaf85f65add077e0.pdf
    • https://cdn.shopify.com/s/files/1/0439/0889/0792/files/watch_my_hero_academia_two_heroes_en.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/35985309150.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_off00005ff1.bin
80547757157d943aaee79b5ac9dacdbe5d0095a8afecd20792d8fc266476c425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF1 5008 bytes
font_01_sfnt_off000070ee.bin
b14e452ac38ea119241e36dc5a04758e95182255fc951c2266fffcac01d12ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70EE 11116 bytes

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