Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf97ad37e166a85…

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 20:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59d6ea2e24eef70d836bb76313cdb2c5 SHA-1: 0fb4e6821bae265694f796f1d520808b59e016d1 SHA-256: 9cf97ad37e166a85f10d2dc0841823a6db0752633fc0b5506b9cfa36e4715c30
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=asus+802.+11n+driver'. This URL is presented within the document body, disguised as a driver download. The file also contains a PDF link farm heuristic, indicating a large number of external links, many of which point to benign content but serve to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which is likely used to lead users to a phishing page or a malware download site.

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=asus+802.+11n+driver
    • https://static.usrfiles.com/ugd/43d598_345297722ced4c138accf789514fac28.pdf
    • https://static.usrfiles.com/ugd/7d21c0_96e3e5fb2848444a9857441f7da9f36a.pdf
    • https://static.usrfiles.com/ugd/b8c837_520695429b8040a68507a86bffe1995b.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7637/files/assamese_new_bihu_song_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3421/files/data_communication_and_networking_tutorial_point.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e9eb2a86294556bd47030af114e33a.pdf
    • https://static.usrfiles.com/ugd/238140_d341dc822cc2486da7b3b32352e8e697.pdf
    • https://static.usrfiles.com/ugd/b8c837_a09ddbb188c44881a8a6ffc2f87c92af.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/3298553109.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/78776340153.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/70279457027.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/anemia_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/49740939834.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_off0000516d.bin
7942e5751ea6359c76150a5b670359a851e1849111696fae1fae56db7ca92597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x516D 4872 bytes
font_01_sfnt_off000061ff.bin
c08e1ce366f2f07a3a48786101e635a293d6f08b938ebcdb153822068e68d458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FF 12860 bytes
font_02_sfnt_off00008ad5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD5 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.