Malicious PDF — malware analysis report

Static analysis result for SHA-256 3297f3ad64c8abda…

MALICIOUS

PDF

42.0 KB Created: 2020-09-06 12:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b343739967a42ac0c72d6224c4b2aee0 SHA-1: 240a26ee39090b65f4bef6371334939c9670650b SHA-256: 3297f3ad64c8abdacbbfe2e456b3fe4c0969fb390e2c7a063bbcbb3f66c83e79
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.club/wix?keyword=direct+and+reported+speech+worksheet+pdf`. The ML classifier also strongly indicated maliciousness. The document body text, though garbled, contains the phrase 'Direct and reported speech worksheet pdf', likely a lure to encourage clicks on the embedded links.

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.club/wix?keyword=direct+and+reported+speech+worksheet+pdf
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/lejerejugigeza.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3935/files/princess_coloring_sheets_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/4433/0905/files/miwagemewabelezedomew.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/32098381611.pdf
    • https://static.usrfiles.com/ugd/d78803_281a9dc0f169496eb7b98590a422ed47.pdf
    • https://static.usrfiles.com/ugd/bae363_b9e4cd41ba5b42d6bb10610e1e2ad183.pdf
    • https://static.usrfiles.com/ugd/3b5dd9_1ff099c0bebb49cd89991496318ab996.pdf
    • https://static.usrfiles.com/ugd/e3325f_0ad48c6f5fa44341a03a60f20131c875.pdf
    • https://static.usrfiles.com/ugd/3e9e83_0b8c647be0bc4e8a80416e1e0a99069f.pdf
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/property_appraisal_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/85961590413.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0486/files/30025921262.pdf
    • https://cdn.shopify.com/s/files/1/0439/4136/3870/files/sweating_bullets_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/40207652239.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/10_rights_of_medication_administration.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/47162240602.pdf
    • https://cdn.shopify.com/s/files/1/0463/8572/5595/files/kupigadurekedezowiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/55214865773.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_off00006501.bin
c43d556549f0629ca28c3bba266053b2310525c9e1b1dd0f86f8da994c1e7a96
pdf-font-stream PDF embedded font (sfnt) at offset 0x6501 5368 bytes
font_01_sfnt_off00007758.bin
938126bf7443228948713dead883f1851eac1c3bf7b63edd0a0a55a4f011c78d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 10428 bytes