Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d9b267babb98e6…

MALICIOUS

PDF

42.5 KB Created: 2020-08-19 23:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83fb18491a26bafea2132c1fb1c64ab5 SHA-1: 6293fc8878a2aa7c930f7305cd73c57f0db1d3a3 SHA-256: c8d9b267babb98e6d53f7af29ce335e17a6a7549433f73af73f1c6ac0b729671
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=send+http+post+request+android, suggesting a lure to a malicious site. The presence of numerous external links and a critical redirector link indicates a phishing or redirection attack.

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=send+http+post+request+android
    • http://fizumifo.giveinfulltoday.org/uploads/1/3/0/7/130739777/businupajepifota.pdf
    • https://cdn.shopify.com/s/files/1/0438/3807/9138/files/tazukibamuvejolawafinebu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8078/files/30750403509.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/94150625543.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/wilitokaxudiso.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/68851846718.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/ritenexisusurigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/86346045303.pdf
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/uci_my_admission.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/zevosisazuronusesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/sindrome_de_burnout_en_madres.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/41349234952.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/riwomipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/soteloseruni.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_off00006565.bin
7574f93c23042bdd782f2d5b9b9d8eef37b4638ba0848c4a42da02e910e21643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6565 5244 bytes
font_01_sfnt_off00007723.bin
5e660b526d1dbd3ab34d7b992ae09560a5f0e3464cbb15a1d38639a8f650e4e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7723 11276 bytes

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