Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8658359963b2583…

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 06:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58ed683e7b0eb45935d5c5a754c7d67f SHA-1: f6254530f86cdbb9b89dc4cd2f5372d7ccbd3e03 SHA-256: a8658359963b258382096531fa3510e4944aa3a2966565ef41e5096e3576c3a2
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is presented within content related to IELTS listening practice tests. This suggests a phishing or scam attempt to lure users to malicious infrastructure. The PDF also contains a large number of links to external PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious redirector. No scripts were extracted, limiting the analysis of direct payload delivery.

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=ielts+listening+practise+test+2019+w
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/puneruxosazowofafoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0476/files/phd_student_cv_latex_template.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/37864863278.pdf
    • https://cdn.shopify.com/s/files/1/0450/3266/9334/files/nujomulixibebuliwunuta.pdf
    • https://cdn.shopify.com/s/files/1/0460/8809/3860/files/meme_creator_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/59875783120.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/yolanda_sald_c3_advar.pdf
    • https://cdn.shopify.com/s/files/1/0437/8951/6958/files/62329672916.pdf
    • https://static.usrfiles.com/ugd/493135_e5a4b9bca5754e13a8dbf22e5feb5539.pdf
    • https://static.usrfiles.com/ugd/822ecd_7f12b22ce9f24ad7b9acb0b592a83590.pdf
    • https://static.usrfiles.com/ugd/225520_b7f99f06d8294c24b4164283a5ce535f.pdf
    • https://cdn.shopify.com/s/files/1/0434/4804/1637/files/21_sheet_street_surgery_windsor.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/zemipedavevojibopusafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/sahih_bukhari_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/kudikerisipopipod.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_off00005a71.bin
21aa430f29eacd2f3e508ab3df6e88e36bb806d8d88276c8d51e05d37f205a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A71 5612 bytes
font_01_sfnt_off00006da4.bin
7bd4474e0dab45aacd9453f130ba0bf5311bad51003ad03f2147731022591d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA4 10180 bytes

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