Malicious PDF — malware analysis report

Static analysis result for SHA-256 3628b48e560a4c8d…

MALICIOUS

PDF

50.7 KB Created: 2020-08-12 05:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63c36bf31213c2a940f0db850f8f28f7 SHA-1: e417bd5b6b2c8dce1229a6cc086033e640ae3eb0 SHA-256: 3628b48e560a4c8dc39c98acfa135864402ad4a665d5e79dc8b002c62a3143e3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.ru/wb?keyword=statistical%20signal%20processing%20and%20modeling%20hayes%20pdf, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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/wb?keyword=statistical%20signal%20processing%20and%20modeling%20hayes%20pdf
    • http://files.dancehampton.com/uploads/1/3/0/7/130739265/nivun-pegisuku-pevipa.pdf
    • http://sukibu.mazzantpainting.com/uploads/1/3/1/3/131379641/1161d5c.pdf
    • http://files.austintxtherapists.com/uploads/1/3/1/6/131637177/zuzinababerobup.pdf
    • http://files.visualtommy.com/uploads/1/3/0/7/130739287/03fec1340.pdf
    • http://files.rosesintheurinal.com/uploads/1/3/1/3/131381799/16d88d4d0c8.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26384136461.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/angielski_w_tumaczeniach_sytuacje_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2599/7722/files/soledovuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/82914422573.pdf
    • https://cdn.shopify.com/s/files/1/0437/3839/8869/files/java_sort_array.pdf
    • https://cdn.shopify.com/s/files/1/0431/8887/9521/files/a_practical_english_grammar_exercises_2_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0446/9909/1098/files/65307808600.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://cdn.shopify.com/s/files/1/0448/1197/6855/files/the_real_easy_book_volume_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5592/files/niwutozinazijelazezuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/tedakaminumaxenovimi.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_off000085ed.bin
041b1d9c62832d80f19a910d8860947072cfdd9aa13ca0cceaca38e9feb63924
pdf-font-stream PDF embedded font (sfnt) at offset 0x85ED 5776 bytes
font_01_sfnt_off0000995e.bin
9e44672249abb52c393750040bac718886c45c2560946799d9967c91dfd99475
pdf-font-stream PDF embedded font (sfnt) at offset 0x995E 11096 bytes