Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8a44d53db2cc1a…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 09:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bb05c5e65dd4ee17753431ed7589253 SHA-1: 58715475c3d60886241b013d4bb79e8cb8806d96 SHA-256: 9b8a44d53db2cc1a656c2e22706931b1312e528c667bf9929d62bcaeed90d1d7
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to software licensing, specifically 'Stellar ost to pst converter 9.0 key'. It embeds multiple links, with one identified as a malicious redirector. This redirector URL, https://ttraff.cc/wix?keyword=stellar+ost+to+pst+converter+9.0+key, is the primary indicator of malicious intent, likely leading to a further stage of attack. The presence of a large number of external PDF links also suggests a link farm, a common tactic for SEO poisoning or distributing malicious 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=stellar+ost+to+pst+converter+9.0+key
    • https://static.usrfiles.com/ugd/0e9fc2_70f57fe76da841c39bd2eb602d24c6b4.pdf
    • https://static.usrfiles.com/ugd/d902bb_4b2d724cc6db4a3792cc5470c1a7148a.pdf
    • https://static.usrfiles.com/ugd/3615fb_05935e706ce742b9a72f7fc977b462c3.pdf
    • https://static.usrfiles.com/ugd/fef806_7e7f77d1f886498595f731eb4972a605.pdf
    • https://static.usrfiles.com/ugd/353d00_7357e8e9b1584cdf963f095100a64857.pdf
    • https://cdn.shopify.com/s/files/1/0462/1392/2970/files/61695246635.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/45881917296.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/86392449221.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xogasetixudaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/66404826926.pdf
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/wugaxozapodonabizulorotik.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb2fd4edc2844a7b26d68894e4b97a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6c43a1de9d949f5ad10a1b366588b14.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_off0000657a.bin
31383c23a7fcd0dc37fdd7e9278b2a1a660e93b340060b447ab8f1c2d295fa99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657A 5588 bytes
font_01_sfnt_off00007890.bin
c8e168823855293b81c25eddf1cbcbd599b598c3763643f7ff9d40966c7e1569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7890 10060 bytes

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