Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed89c55841442de…

MALICIOUS

PDF

54.3 KB Created: 2020-08-08 12:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96bacb3e72f21a7774090722539af6f2 SHA-1: e949a34f73080b02625c8b9ba23de27364da8570 SHA-256: 7ed89c55841442de23915bbfee00c9bfd2c2d6060293f264817b99e28666be2c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, pointing to 'https://ttraff.ru/pify?keyword=qualities+of+good+teacher+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to this malicious site. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or to obscure the malicious redirector.

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=qualities+of+good+teacher+pdf
    • http://files.sompbags.com/uploads/1/3/0/8/130814132/rovanebelufilet_bejojubos_wuwulamalufej.pdf
    • http://files.georginaannetaylor.com/uploads/1/3/1/4/131407647/345491.pdf
    • http://files.villageofpecosnm.org/uploads/1/3/0/7/130739616/5139749.pdf
    • http://files.jj-trailers.com/uploads/1/3/1/4/131437976/xebipipinakug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/fox_soccer_plus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/63550632559.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/3948295251.pdf
    • https://cdn.shopify.com/s/files/1/0437/5363/5989/files/gonuvobixipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/jexizuzuzojubidibonikatos.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/sotafogijot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/18893624719.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/949986333.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/57436266448.pdf
    • https://cdn.shopify.com/s/files/1/0436/4461/6864/files/vavavukovekujixadesise.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7642/files/bible_quiz_questions_and_answers.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_off00009655.bin
9bec39a193e3accfa9d9cf5990922c4663c841fe860e796b86220e7bfec97522
pdf-font-stream PDF embedded font (sfnt) at offset 0x9655 5480 bytes
font_01_sfnt_off0000a8f1.bin
e6058a2f1b9c8fc564b7831a5ce9256a969a540976e2b20afc0bf1ac7a975f3b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F1 10452 bytes