Malicious PDF — malware analysis report

Static analysis result for SHA-256 99129f98b51a0d23…

MALICIOUS

PDF

49.1 KB Created: 2020-08-07 02:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 199a14697c6db7bd4ac432835d38a5ae SHA-1: 414349fe8f902b07b0b1e96bdbbffdac776f3724 SHA-256: 99129f98b51a0d239f57695207d781cdf4245af867fb13ca2abf261c0e2eac03
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document body also contains numerous links to external PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to increase visibility. 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.ru/pify?keyword=tafsir+al+quran+bangla+pdf+download
    • http://files.landfallcert.com/uploads/1/3/0/9/130968931/e8d1504.pdf
    • http://files.nathanalandavis.com/uploads/1/3/1/4/131407552/1704144.pdf
    • http://files.slingingbirdies.com/uploads/1/3/1/6/131606201/lumop.pdf
    • http://files.geofuljazz.com/uploads/1/3/1/3/131380741/2893472.pdf
    • http://files.mountainridgecounseling.org/uploads/1/3/0/7/130775848/8e6607.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/21415051471.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/79701079259.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/fipovez.pdf
    • https://cdn.shopify.com/s/files/1/0432/7827/0619/files/22643627699.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/sawijuvasomatatebik.pdf
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/63994079808.pdf
    • https://cdn.shopify.com/s/files/1/0429/2624/3996/files/muwudamuzoguwaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdf
    • https://cdn.shopify.com/s/files/1/0434/4250/3832/files/43702500535.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/cambridge_english_advanced_2_authentic_examination_papers.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_off0000602b.bin
ce931dca4daea942e790369dde3cc16e26fce26b40af8ecaf3bbc179caadd318
pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 5516 bytes
font_01_sfnt_off000072f8.bin
a4f2f3b7f28e16de465adf0a3d715d1dc40f978f1d4cefbc95bc4a7671088556
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F8 7988 bytes
font_02_sfnt_off00008b91.bin
a8fe4be5a183f34da8fc28dc0cbbfd6de7c36e1bbf8c837166fbb8f960504f41
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B91 14028 bytes