Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7a1db8e9ab0b79…

MALICIOUS

PDF

38.5 KB Created: 2020-08-28 11:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 074f024e4ea42bbf43f175c104512688 SHA-1: eed9469d067ae90bcb5aa13cc75f009d15bae143 SHA-256: db7a1db8e9ab0b7943e628a095af2e686babfae126697d22e5318c41323526be
150 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=oxford+ingilizce+hikaye+kitaplar%25C4%25B1+stage+3', which is flagged as malicious. This suggests the PDF's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=oxford+ingilizce+hikaye+kitaplar%25C4%25B1+stage+3
    • http://jolonulu.marksturgess.org/uploads/1/3/1/1/131163559/fivixozut-vunaru-pibevaparabaw-vowig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/lafosanisiwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/pte_academic_reading_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/gadopaduduxavatelevefugip.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/26792512163.pdf
    • https://cdn.shopify.com/s/files/1/0432/2364/6365/files/variance_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0429/3941/6732/files/fivura.pdf
    • https://cdn.shopify.com/s/files/1/0454/6487/9256/files/cambridge_primary_english_stage_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3267/files/48989131473.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/tariwufaxiduduguxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6262/4405/files/koxupefumigozurexi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2178/files/silakitek.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/35000516867.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/faziwudipexifedasotozo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/kijajarilibe.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_off0000458f.bin
e57b880e41c1f0e08cc449bbe9e29f473e33a3e06a9b354e5b5c525e4e3ca9dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x458F 5712 bytes
font_01_sfnt_off0000590d.bin
8fb455fc3716638448ab96225f6fec9db3ca7df647431a8523d940ffb9be96f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x590D 11208 bytes
font_02_sfnt_off00007c8b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8B 4324 bytes