Malicious PDF — malware analysis report

Static analysis result for SHA-256 c930282b8cab352b…

MALICIOUS

PDF

46.4 KB Created: 2020-09-02 10:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2651a222ef5688bd7653780536c8d167 SHA-1: 2239f8e9fb74e6ca7594b6a5fda76fb165ef4fa1 SHA-256: c930282b8cab352b61c549d6e0ce113726a8ebdbaf923be6bbb61db1d3257649
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The embedded URL 'https://ttraff.link/wix?keyword=chrome+spell+check+dictionary++failed' is presented as a lure, likely to trick users into believing there is a problem with their browser that requires immediate action. The PDF also contains a link farm, with many links pointing to Shopify domains, though most of these appear benign. The primary malicious IOC is the redirector URL.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=chrome+spell+check+dictionary++failed
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/mamudutudonumasigenivokor.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/6th_grade_math_fractions_decimals_percents_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/0651/5611/files/lowokatesofutekijofomete.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5844/files/canon_eos_60d_utility_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/wulagep.pdf
    • https://static.usrfiles.com/ugd/0511f5_b91841cdf3b34cf0a583fdbd1ca9106c.pdf
    • https://static.usrfiles.com/ugd/7041e4_e48d5dac5cae4b3b87ec842f09a1091a.pdf
    • https://static.usrfiles.com/ugd/82e28d_00bdcd37b120471e9e14a57184896963.pdf
    • https://static.usrfiles.com/ugd/df73ab_3bf96183ae0d48469e336f940d8cda80.pdf
    • https://static.usrfiles.com/ugd/b7ed05_6d9e0dbbe8474a838437e08882ea05a1.pdf
    • https://static.usrfiles.com/ugd/c8d394_b59203746bef4d659a25d91bb1247b78.pdf
    • https://static.usrfiles.com/ugd/fbcb80_a543e219ce1c4ca48c2f5a92dd558b4d.pdf
    • https://static.usrfiles.com/ugd/0c268c_9fa7e91472b547cf9800424e37d68f91.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/68087447729.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/xomapilopapopufilutozuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/4153326207.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_off0000759b.bin
049a43cc69272601f965ec853f3cefd7066a45b2a05c148971aec533bae3b43b
pdf-font-stream PDF embedded font (sfnt) at offset 0x759B 5464 bytes
font_01_sfnt_off0000880e.bin
18e1c9c9619f1b54766d17fad56d5bbf92e4c78ddf78e41979abadf770c4d50b
pdf-font-stream PDF embedded font (sfnt) at offset 0x880E 10644 bytes