Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f33208831a0cb67…

MALICIOUS

PDF

40.1 KB Created: 2020-08-18 23:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a862db0c0cae4752c9ec1bc89eae8744 SHA-1: c7f7029bb356bf0f8edfc4db50170f1c009d5cca SHA-256: 3f33208831a0cb67ac7a23f9788e7c16f87b021ecc19fe6aa25caa9d1fbcca71
128 Risk Score

Malware Insights

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

The PDF file contains a deceptive call-to-action disguised as "printable brain teasers worksheets with answers". It embeds a link that redirects through known malicious infrastructure at ttraff.com. This suggests a phishing or social engineering attack aimed at luring users to a malicious site. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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=printable+brain+teasers+worksheets+with+answers
    • http://magij.villagescommunity.com/uploads/1/3/1/1/131163635/7445738.pdf
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/75779585932.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/biennial_report_california.pdf
    • https://cdn.shopify.com/s/files/1/0436/2685/6601/files/agricultural_research_policy_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/aesop_absence_reporting.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/75338637617.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/zunerovi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9695/7343/files/30814310091.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0498/files/simple_receipt_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/wowobogipusenuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/zisolofolizugawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/72340659421.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_off00005ad7.bin
2de4bc1c35fa2054e1f15c9ad0b57e461bc6caf88f0cbdeea8849ace2b583782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD7 5072 bytes
font_01_sfnt_off00006c1a.bin
3332d763abf346616f8da017b8e61c7e43c6b8c3734ef7e43a7fa15af44ab726		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1A 11648 bytes

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