Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd251ac00ed7795…

MALICIOUS

PDF

43.0 KB Created: 2020-08-29 13:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5280c7c4423ab51630a0fb664425196c SHA-1: c63c2a90287bfc12f413387cf3d22aaa0a52e57e SHA-256: cfd251ac00ed7795afaca8362f8f2f02dc818aeaf4d9f54dae7090520818e0fd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm, suggesting the document's primary purpose is to host numerous external links. The presence of the malicious redirector URL https://ttraff.ru/wix?keyword=barata+segundos+carros+de+m%25C3%25A3o+sheffi strongly suggests a phishing or malware distribution attempt.

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.ru/wix?keyword=barata+segundos+carros+de+m%25C3%25A3o+sheffi
    • https://static.usrfiles.com/ugd/b8c837_2fa57035abca4376ab48879dd9062f50.pdf
    • https://static.usrfiles.com/ugd/3b7182_7fe7c726834d47c7b8c36d0128a392f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b22c3e83a6d040c882ba970a9c4e24dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_9785048858594324a5d985888137b020.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf257bcf4967410988f926d4b61bbb70.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ed79bab5be24f2c97e0c2b71f366cfd.pdf
    • https://static.usrfiles.com/ugd/d55797_f821360fd81d47158b35dd7e47fb4bec.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1665510cc943a4abd4f90de84a8551.pdf
    • https://static.usrfiles.com/ugd/b8c837_36333086043b4e07be6b7cde5fc459aa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/6534560684.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/desibiki.pdf
    • https://cdn.shopify.com/s/files/1/0434/7533/7368/files/43673969049.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/61451791552.pdf
    • https://cdn.shopify.com/s/files/1/0447/8792/5143/files/book_review_on_wings_of_fire.pdf
    • https://cdn.shopify.com/s/files/1/0433/9977/4364/files/2754248986.pdf
    • https://cdn.shopify.com/s/files/1/0460/3435/4340/files/pobegatapegawo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4360/2080/files/bcm_hostel_admission_form_online_2019.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/29378708061.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3743/files/87788953348.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_off00006507.bin
8deb851398f096dc42c73f7e313c70df1551ecc8856e5a7f676eb9561a64be25
pdf-font-stream PDF embedded font (sfnt) at offset 0x6507 5772 bytes
font_01_sfnt_off000077dd.bin
78afb9467c33de3f36cbe55965047b9053d1cbe2b4607aa3f9274d955f8e6994
pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 12036 bytes