Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2558d7f94718c3…

MALICIOUS

PDF

43.3 KB Created: 2020-09-02 02:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f4c04ba48e6fd68ae1d6148fec9e0e5 SHA-1: f002aef2a9c119b94077fd72ec9818cd9202b341 SHA-256: 8f2558d7f94718c3141adbfad579f80e76c4d065c642a4aa3fc83b1f08605bdb
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=afterlight+apk+latest+version'. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external links, many of which point to Shopify-hosted PDFs. The document body also contains a call-to-action phrase, reinforcing the lure. The primary malicious URL is used to redirect the user, likely to a malicious download or phishing page.

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.cc/wix?keyword=afterlight+apk+latest+version
    • https://cdn.shopify.com/s/files/1/0434/9214/7366/files/pifej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/tituxuruwumi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/munukixiwakifuja.pdf
    • https://cdn.shopify.com/s/files/1/0435/0659/8040/files/low_anterior_resection_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0429/6533/6217/files/webopala.pdf
    • https://cdn.shopify.com/s/files/1/0437/7644/2530/files/22661634591.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/81388910354.pdf
    • https://static.usrfiles.com/ugd/fbccce_3519d612e9c74bf3a0af36dd0995a25d.pdf
    • https://static.usrfiles.com/ugd/76156b_93e60573058b4e1e9fea398a55f1bedf.pdf
    • https://static.usrfiles.com/ugd/0e6328_4fb466e5de494f02a06b5a00b506b831.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e116894d6184ac1bfd4b3303e2beaed.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_8bad0ba8042245d79d6a3bbc11c8ac95.pdf
    • https://static.usrfiles.com/ugd/359e64_4fc1cf9daf144485867a2a084438ad03.pdf
    • https://static.usrfiles.com/ugd/8b9728_ed4a76873f5a4d3f8adcb1a41d624ce6.pdf
    • https://static.usrfiles.com/ugd/40512e_83f1a1ba610d4eaea20c3a64cc87f3b2.pdf
    • https://static.usrfiles.com/ugd/40512e_53a1565cec7c4f0084f0238ef436e426.pdf
    • https://static.usrfiles.com/ugd/0779a3_631cf75856474463a989baf79cc73b66.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_off00006829.bin
0d1898a62448f1af98c86e9fda51e7d01aded7c7d6bd83a084794d3c7bd0f15c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6829 5276 bytes
font_01_sfnt_off00007a1f.bin
efb79965aeecb7f1b2972a29b0033ef6fd1859a043c710577cab902e22d8ec87
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1F 11404 bytes