Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cbe1722e8b55ff…

MALICIOUS

PDF

47.8 KB Created: 2020-08-08 15:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 166a340bdc5d0fd227e9db11aaabe499 SHA-1: b99b0e12a0995e08fa5543114f63e249e094703b SHA-256: 58cbe1722e8b55ff254163c00c641795677147a496b366153c6df150e8f7a8ea
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=cengage+chemistry+jee+advanced+pdf`, which is designed to lure users into clicking it under the guise of educational content. The document also contains a mass of external PDF links, many hosted on `cdn.shopify.com`, suggesting a link farm SEO tactic to obscure the malicious redirector. No scripts were extracted, but the presence of a malicious redirector and the SEO link farm strongly indicate a phishing or scam attempt.

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/pify?keyword=cengage+chemistry+jee+advanced+pdf
    • http://files.ohioyarn.com/uploads/1/3/1/1/131164474/jevezapuxuxazazunufe.pdf
    • http://files.eye-of-iris.com/uploads/1/3/0/8/130874266/vejis.pdf
    • http://files.umbrellaconsett.com/uploads/1/3/1/6/131606198/gikevivul_gixewo.pdf
    • http://files.ifindoubttravel.com/uploads/1/3/1/4/131437515/xifepirelu.pdf
    • http://tiwanul.williamjensenwrites.com/uploads/1/3/1/3/131380429/tidup_dugaboruwinikew_wokotowifaz.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/honda_hrr216_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0452/6279/9005/files/computer_all_shortcut_keys_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/voxow.pdf
    • https://cdn.shopify.com/s/files/1/0448/2295/4141/files/cardiopatia_coronaria_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0436/0830/9923/files/tikovuzefuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/mifofomavuzumawu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8576/5535/files/lapixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/98331472012.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/36659991887.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/wakikulite.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/71625115770.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_off00007a9a.bin
d8f54f02f48ada482aab28aae45825039a01c54525e6d61259e424772d343675
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 5680 bytes
font_01_sfnt_off00008dd7.bin
494ec9a5333746d703ce1ad6008d8c6cc9d8d736f098ad705c60fe12b81bcc4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD7 10804 bytes