Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbf87cd52ade084…

MALICIOUS

PDF

61.8 KB Created: 2020-10-17 00:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e9834820161df74a23fabc815cbabb SHA-1: a5e3b86a965cf20ff0d85faa9dbdc3279fde2be5 SHA-256: 1cbf87cd52ade0842f399e31a83284e8eb583ba45f4d1bd50a8874b75d448716
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text related to 'forearm forklift lifting straps instructions' and references the malicious URL, indicating a social engineering lure. The presence of numerous external PDF links also suggests a link farm or SEO manipulation tactic.

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.link/123?keyword=forearm+forklift+lifting+straps+instructions
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f873b67a5559.pdf
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f89250dbcf05.pdf
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f86fabed5d3f.pdf
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f87c6e0826f0.pdf
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/3408347.pdf
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdf
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/bibesekukemugedovofa.pdf
    • https://uploads.strikinglycdn.com/files/180b2bee-bfad-49ac-b737-3d519400147a/63232546754.pdf
    • https://uploads.strikinglycdn.com/files/dfcb52a9-a5d4-43a8-8f0f-630e5e40a06e/1876332440.pdf
    • https://uploads.strikinglycdn.com/files/bb9c9a2e-34ff-4c83-9ac7-788993ee0b02/deluv.pdf
    • https://uploads.strikinglycdn.com/files/029dc03b-9dfe-494e-b48c-972198f68622/zopibiraxos.pdf
    • https://uploads.strikinglycdn.com/files/d7b67b3b-a860-4ce9-b0cc-b284274f308f/71051637917.pdf
    • https://uploads.strikinglycdn.com/files/193dcb14-5be9-4ea2-bca6-5442074d9173/fuvogikamafeze.pdf
    • https://uploads.strikinglycdn.com/files/5b5ec6ca-36be-4189-8645-64df1549fb89/pejonugafitedonin.pdf
    • https://uploads.strikinglycdn.com/files/7c23c359-ccb5-486b-b4dc-92b723f66748/24732833879.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/rojisivux.pdf
    • https://cdn.shopify.com/s/files/1/0485/9035/6640/files/81905970132.pdf
    • https://cdn.shopify.com/s/files/1/0496/0606/6325/files/busexojogiban.pdf
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/teks_pembukaan_uud_1945_untuk_upacara.pdf
    • https://cdn.shopify.com/s/files/1/0432/6444/2521/files/binaferomumoxaju.pdf
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/conversor_para_epub_online.pdf
    • https://cdn.shopify.com/s/files/1/0439/0843/2040/files/gunson_carb_balancer_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0485/0696/2075/files/38428115275.pdf
    • https://cdn.shopify.com/s/files/1/0496/1750/2361/files/remote_desktop_connection_via_android.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_off0000b209.bin
8c69dccc99de5fc01815e7226fdeacdc90fd51b21eb71e3ecffb5d04793c4a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB209 5356 bytes
font_01_sfnt_off0000c42e.bin
97cc4a6f338a54e738b0e310bd08a6492fa1196dea27ce77011be1cf54dbd2bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC42E 11076 bytes

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