Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da39b54d6894321…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 13:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a662bf1fe4ee3ad35b6a60550bb5c66d SHA-1: 0f230dc5761b840d338903adcace2451ac20ea18 SHA-256: 8da39b54d6894321e996187c46c66dd1032ad703e756491532dfc1b9a9e79f37
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=3+bedroom+house+design+pictures+in+kerala. This indicates the document's purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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/wix?keyword=3+bedroom+house+design+pictures+in+kerala
    • https://static.usrfiles.com/ugd/4bb894_dc0ca9fcbb3f4211988528d3daf9f199.pdf
    • https://static.usrfiles.com/ugd/b8c837_a910ebb2b4f94c85bd93113981655c12.pdf
    • https://static.usrfiles.com/ugd/ce5d00_430e4c8e038f45ceb13af8dc1fb71675.pdf
    • https://static.usrfiles.com/ugd/3f80ec_d1a2188df1ad4a599d5cd4ce6a4cfd6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5275f14275f4be9b28eedb7b2fde6de.pdf
    • https://static.usrfiles.com/ugd/3aee12_4adaf7f5bd434a83bf4b75149a5000a6.pdf
    • https://cdn.shopify.com/s/files/1/0462/7949/1733/files/sapna_choudhary_songs_video_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/59038232849.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/nokovafiwew.pdf
    • https://cdn.shopify.com/s/files/1/0465/1099/7654/files/eminem_rap_god_clean_video.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/arithmetic_and_geometric_sequences_worksheet_kuta_software.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/gabadizumoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.pdf
    • https://cdn.shopify.com/s/files/1/0471/0691/6502/files/lutof.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_off00006223.bin
2addc2c8531d4076085f0df43e9941830e9ca40a421f92644b0f1c08dc6f4d17
pdf-font-stream PDF embedded font (sfnt) at offset 0x6223 5760 bytes
font_01_sfnt_off0000757a.bin
a4c05b3041679411577ac6ace134c4542bbda80a51a12b5cdea41b46c8c099fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x757A 4184 bytes
font_02_sfnt_off0000856b.bin
126e586f438008d938aa9cfc7d08dfece4cc59e0172d774775b60960cb482d68
pdf-font-stream PDF embedded font (sfnt) at offset 0x856B 10040 bytes