Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d7c99681bb56c8…

MALICIOUS

PDF

50.1 KB Created: 2020-09-03 13:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c232ae4a91e51b4383f458371beacfa1 SHA-1: 5423f907b3c62be7665bdf045079bdc89706d031 SHA-256: 53d7c99681bb56c8c77f523ecda52e062aeb25e5edb518d9e5f33af3bdfc6801
136 Risk Score

Malware Insights

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

The PDF file contains a lure related to an admission form and includes a link that redirects to known malicious infrastructure. It also contains a large number of external links, many of which point to benign Shopify domains, suggesting a link farm for SEO manipulation or traffic redirection. The presence of a malicious redirector link is the primary indicator of malicious intent.

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/wix?keyword=b.+ed+admission+form+2019+up
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/donizebodamesozus.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/zagikamifumewesobewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/15273102772.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/58550887559.pdf
    • https://cdn.shopify.com/s/files/1/0433/6133/7498/files/ferramenta_de_cidade_do_drago_dc4u.pdf
    • https://static.usrfiles.com/ugd/7f16bd_44f6cbb3c2da48aca754c32a3e704cca.pdf
    • https://static.usrfiles.com/ugd/0aab01_7c1952d003ae4bcdb8d95144b87b512e.pdf
    • https://static.usrfiles.com/ugd/2813e2_3b33338526d04437adaa81ddb652e532.pdf
    • https://static.usrfiles.com/ugd/d01287_ac9250d62ef84b1eaf6db99c770d23f2.pdf
    • https://static.usrfiles.com/ugd/843280_be6850736b8e4b67abd0578a98cf5407.pdf
    • https://static.usrfiles.com/ugd/b77b08_56afe24d4cf0455b903a679ac0cb695a.pdf
    • https://static.usrfiles.com/ugd/7be1cd_99f4d019f08d4abe8f9f0cfcbae2b95a.pdf
    • https://static.usrfiles.com/ugd/516793_26cad995808c453e8377e0e662cda856.pdf
    • https://static.usrfiles.com/ugd/5b9a87_366e7205c1d44e6d9dfe6959734bea79.pdf
    • https://static.usrfiles.com/ugd/a98ecc_02a85e0e1c45474ca1e918dcc17899b0.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_off000084d7.bin
0308b24c7144d602c3233232c0d2c48f02538ea97f21db276e5564f6008d5afa
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D7 5720 bytes
font_01_sfnt_off0000983f.bin
aa87b960219db54fd4f2e3efb06b9d4fb43a09289e9c24061e8b0664f4997757
pdf-font-stream PDF embedded font (sfnt) at offset 0x983F 10540 bytes