Malicious PDF — malware analysis report

Static analysis result for SHA-256 3398f045b3a098c8…

MALICIOUS

PDF

53.5 KB Created: 2020-08-07 10:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b36c11b6cb74af6b510f7f10c8c5ba SHA-1: 2323bd3b73fed34fd686807cc00c30a269c67dff SHA-256: 3398f045b3a098c8c15dc7f07474729a3282082ff549e339048a395ebc13d436
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=bubble+answer+sheet+1+60+pdf'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=bubble+answer+sheet+1+60+pdf
    • http://files.paigeeverson.com/uploads/1/3/1/3/131383581/puvejejomibiweloxeki.pdf
    • http://bamobuga.syrcemusic.com/uploads/1/3/1/3/131380600/8271390.pdf
    • http://godadogu.mcclellanmusic.org/uploads/1/3/1/3/131398140/45606541a9d85c1.pdf
    • http://luzige.gentlepalmkarate.com/uploads/1/3/1/3/131383657/e33bc77caf897.pdf
    • http://files.abstraxthairdesign.com/uploads/1/3/0/9/130969505/1886136.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4101/files/ativo_intangivel.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/42847204293.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/important_name_reactions_in_organic_chemistry_class_12_cbse.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/think_race_and_ethnicity.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1752/files/ronenofeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/children_santrock.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/59725831126.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/linear_algebra_with_applications_9th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/62498942899.pdf
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/81643805012.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/folivelaminaruvewo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3574/4673/files/bullet_force_hacked_account.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_off00008ff2.bin
37b4d90119f593ec3eca5dc5b82c9d41a7c5584567346f7358bdcc8404aa857e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF2 5756 bytes
font_01_sfnt_off0000a399.bin
9aa3cb7a80d1f9f3b3325d2bb302c2c6a61172b523d0cfbd9fc86cb517a71dc7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA399 11040 bytes