Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8d9136b3efc23e…

MALICIOUS

PDF

40.9 KB Created: 2020-08-17 01:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4faac54d73a219a6ee72e64c07d1414 SHA-1: 5c1439bb856f49d238b5642590f4ee58046726d5 SHA-256: fe8d9136b3efc23ea3d0940534ea4f08b8d9a245dbf55153e82fef696e05fd9d
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=activator+windows+7+ultimate+bagas31', which is designed to lure users with the promise of a Windows 7 activator. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm for SEO poisoning. The presence of a 'Security software disable instruction' heuristic further indicates malicious intent, aiming to lower defenses. The overall pattern suggests a phishing or malware delivery attempt disguised as a software utility.

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.ru/pify?keyword=activator+windows+7+ultimate+bagas31
    • http://files.nikosmarinos.com/uploads/1/3/1/4/131406831/2278749.pdf
    • http://files.clarissafortier.com/uploads/1/3/2/3/132302876/wimugiduvap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/72770789298.pdf
    • https://cdn.shopify.com/s/files/1/0438/3077/1869/files/physiology_of_vision.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/12931506263.pdf
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/magob.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/1956282508.pdf
    • https://cdn.shopify.com/s/files/1/0438/3470/4034/files/dia_os_x.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/15861743546.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/my_house_free_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/mamiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5458/files/89620156679.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/xagogawog.pdf
    • https://cdn.shopify.com/s/files/1/0435/5604/4951/files/pokawugodikutimefikebis.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_off00006031.bin
914139b99ab3538b6040d86aaf8dd5cb6093bdb788e021c560cc3d7d8e93fdb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6031 5836 bytes
font_01_sfnt_off00007412.bin
5b8019dee98d6fa214ffeeb25e6389674ff49ec299bac375f7f1fcf21df93c79
pdf-font-stream PDF embedded font (sfnt) at offset 0x7412 10136 bytes