Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a459354b0c5a94…

MALICIOUS

PDF

37.6 KB Created: 2020-08-31 09:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4af3c0ad2f71b821ac3f120b9f0f7fb1 SHA-1: 0d69d0f1c1fe7112535ec8ed39e9ae77aded8429 SHA-256: a3a459354b0c5a947ef2c808f51e902ef590ebb4fdcbfe1bc0b215fc590e5b09
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/wix?keyword=curmudgeon%2527s+guide+to+practicing+law'. The document body, though heavily obfuscated, contains text related to a 'Curmudgeon's guide to practicing law' and the redirector URL also references this topic, suggesting a lure. The presence of a large number of SEO-optimized PDF links, many pointing to benign Shopify domains, indicates a link farm strategy to obscure the malicious redirector.

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/wix?keyword=curmudgeon%2527s+guide+to+practicing+law
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/gdiplus_dll_missing.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/21652907042.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/pizivilobavewavuwas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0206/8122/files/84190856838.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/appalachian_trail_hiking_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/figetovatadip.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/database_case_study_examples_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9817/files/enter_sand_man_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6822/files/superlative_adjectives_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/fake_newspaper_front_page_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/tefaromabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/tizasepesikuse.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5645/files/nokijotepudarovonebibi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/sedagavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/56365540495.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4183/files/vujinefop.pdf
    • https://cdn.shopify.com/s/files/1/0451/4437/5450/files/beginners_guide_to_gymnastics.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_off0000547a.bin
b305b7e0d111f9d228875326e79371d30be29c32ebde7b02315d99ec291350d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x547A 5424 bytes
font_01_sfnt_off000066e9.bin
1201667937936ec5442c090b281bab605159cd4b6c393f8bd8e90f62db4f60c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x66E9 10088 bytes