Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdbdc3894c84b1a…

MALICIOUS

PDF

42.3 KB Created: 2020-08-24 21:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8950225feb51ad7b9eab9137b24e439 SHA-1: 8510c40fe38d7762c443e5318a2af3ed6b86a7f1 SHA-256: 3fdbdc3894c84b1aaf0127d762de6a07b45c22298490cf000eb09777dff01fdc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, creating a link farm. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/pify?keyword=extended+essay+skeleton+outline+template. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.ru/pify?keyword=extended+essay+skeleton+outline+template
    • http://files.collection-me.com/uploads/1/3/2/8/132816195/bc6f4cdc2c0.pdf
    • http://xagefuseg.silverleafacu.com/uploads/1/3/1/4/131454012/totojaxovudax.pdf
    • http://fevozo.taxi-service.us/uploads/1/3/2/8/132814900/nozewum-xawilaritudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9173/files/abzurdah_libro.pdf
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/sazari.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/25713356843.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/solving_equations_with_angle_relationships_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/fepofeki.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/jeevan_praman_patra_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/27176598804.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/26951393132.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3821/files/arduino_pro_mini_328_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/adm_pro_apk_6._4._0.pdf
    • https://cdn.shopify.com/s/files/1/0447/5289/6154/files/dazevulobufupe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/82747683207.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_off00005a61.bin
104a1e99c114f1ba6751256187e6a35c25ece2685d48046d232798ee3793a87c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A61 5084 bytes
font_01_sfnt_off00006ba4.bin
b0679bc6dd53e0914b6ca60a3f26c9a3d74fde473c3a2322f82f8ba045a2fcb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA4 10116 bytes
font_02_sfnt_off00008e33.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E33 4324 bytes