Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade5a3e98007857d…

MALICIOUS

PDF

43.1 KB Created: 2020-08-08 12:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7bd8c558035476a8faaa3881cd4fb8c SHA-1: 8ce4e2443c0a26bc34e81e1e3f0856e3ba3fa5f0 SHA-256: ade5a3e98007857d0a80491d2884473321b7109f13a30436cc9a65cf96eaba86
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service at 'ttraff.ru'. This indicates a link farm or SEO poisoning attack designed to drive traffic to malicious destinations. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=adjetivos+en+ingles+comparativos+pdf
    • http://files.graciejiujitsurocks.com/uploads/1/3/1/4/131414743/5771398.pdf
    • http://files.gwrra-iowa.com/uploads/1/3/1/8/131871740/famikopot-tajepifu.pdf
    • http://files.womensgivingcircle.org/uploads/1/3/0/7/130775952/3baf12adbb40a2.pdf
    • http://files.winstickers.co.uk/uploads/1/3/1/1/131163953/1540433.pdf
    • http://kapev.pforbes.org/uploads/1/3/1/4/131407818/46822c45f6da4.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/risuwobulinepob.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/xoloritusat.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/sadizodupewaxagidujojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0814/files/xibesuxaruxodonuzisopalo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/90935057286.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/navigation_bar_in_html_and_css.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/70457449949.pdf
    • https://cdn.shopify.com/s/files/1/0428/8629/9815/files/data_analytical_skills.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/zomotifemikuluduxil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9668/files/pofomubek.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/tinusuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28664871254.pdf
    • https://cdn.shopify.com/s/files/1/0432/4943/4792/files/88051497189.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_off00005d46.bin
1ae1d62149d0d699d39e452733d9bc1bbca0996a4017db27afb72c1d0c936ca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D46 5600 bytes
font_01_sfnt_off0000704e.bin
1fd9116efd5ebbc18005e193c7a95d1821d1383db0f333d68b370da2d2eb76e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x704E 15108 bytes