Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f4bc6ead281986…

MALICIOUS

PDF

77.9 KB Created: 2020-09-01 20:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61ffbf343bc3a70d9f0315601defbb9f SHA-1: 81dd3a2d45e9dc7e3ef7bfc959632fb10b3365f5 SHA-256: b2f4bc6ead2819868169f3ce1c3c5265782025f674643f5fe18b1eea8463a42d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector infrastructure. One prominent link, 'https://ttraff.cc/wix?keyword=at%2526+t+4g+lte++speed', is identified as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct the user to malicious content. The presence of numerous links to external PDFs, as indicated by the 'PDF_SEO_LINK_FARM' heuristic, further supports the attack pattern of luring users through deceptive content.

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.cc/wix?keyword=at%2526+t+4g+lte++speed
    • https://static.usrfiles.com/ugd/b77b08_63cd4b11191f4b808974e94a26c40387.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_ff550af95b9d4092bc5efda0b0b7c5ad.pdf
    • https://static.usrfiles.com/ugd/09273f_155b3f79a65741c3856de17ae3b923c7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2359/files/67223834673.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/magirijow.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/talubelekavumasixunoz.pdf
    • https://static.usrfiles.com/ugd/9c43ec_b7ba8bbfd4044923ada65f8b280f840f.pdf
    • https://static.usrfiles.com/ugd/5af86b_7480dec3240e40d58b867ed0fde23725.pdf
    • https://static.usrfiles.com/ugd/6f7357_a65bde169b52429bbe644a998220cc00.pdf
    • https://static.usrfiles.com/ugd/9aab09_472f09b3fba04368b7a91d6ae6700431.pdf
    • https://static.usrfiles.com/ugd/3e87bf_df86ed3a4bdc4e7490afad493dbc468c.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/norexejixogenakunimaxuta.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/gregory_mankiw_principles_of_economi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/14665193027.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b074.bin
a1222e99e23b015d2380578ea5a739120e2804310da280162cdace0716d27ddb
pdf-font-stream PDF embedded font (sfnt) at offset 0xB074 5928 bytes
font_01_sfnt_off0000c525.bin
a533472c81d315c1fb16d15e8594173726dbc1a3b8912aeb086a211e25a92c06
pdf-font-stream PDF embedded font (sfnt) at offset 0xC525 4144 bytes
font_02_sfnt_off0000d347.bin
80573633f91f58c580e9a07b05c920fffc6791d4c938d7637739d67f48643cbe
pdf-font-stream PDF embedded font (sfnt) at offset 0xD347 17764 bytes
font_03_sfnt_off00010850.bin
b690ba768bca37c08d8dfa1616ddfd4717be8943d324517ca9f58fa582fe9c25
pdf-font-stream PDF embedded font (sfnt) at offset 0x10850 19204 bytes