Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afa71d134e672c5…

MALICIOUS

PDF

49.2 KB Created: 2020-08-17 15:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4076ac279553d78184ef602e54260fab SHA-1: 9ad2a366d85edba00ecfed99898f61777eb4da09 SHA-256: 9afa71d134e672c5cb042050d56f85d62201db24a74061aff1cf671b96e6a134
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily corrupted, contains text fragments related to 'Avd manager not available in android studio' and the URL itself, suggesting a social engineering lure. The file also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination. The primary IOC is the redirector URL.

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=avd+manager+not+available+in+android+studio
    • http://vipixej.grmfinalportfolio.com/uploads/1/3/2/7/132740228/votuvojedugori.pdf
    • http://files.zanyunoodles.com/uploads/1/3/0/7/130739381/sikete-wemotuta.pdf
    • http://files.catherinegtripp.com/uploads/1/3/0/7/130740165/nelutegevoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/barakhadi_marathi_to_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/21286880276.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9426/files/jevabavogemulogipad.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/gixodazanuxewamijilur.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/15109382292.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/bundesliga_spielplan_schalke.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/92032585325.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/gesogidi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/vevulefefulasilibeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/6152/7206/files/clinical_virology_richman.pdf
    • https://cdn.shopify.com/s/files/1/0439/4283/8427/files/xikares.pdf
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/microservices_architecture_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/91017130383.pdf
    • https://cdn.shopify.com/s/files/1/0429/2460/5599/files/6140891949.pdf
    • https://cdn.shopify.com/s/files/1/0445/4242/7295/files/improving_speaking_skills.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_off000082d4.bin
b28bd00feece43f2cd60d8e2b5c22641c7b5fbe4021a903c23cfa13159980ea5
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 5332 bytes
font_01_sfnt_off000094db.bin
ad0c61bdde64abeaeb39351e8d2aed3e8ca2de8a5200d72651877ca175b9c45c
pdf-font-stream PDF embedded font (sfnt) at offset 0x94DB 10068 bytes