Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd40db1b605c5dc…

MALICIOUS

PDF

58.0 KB Created: 2020-07-16 21:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 537a90aea6cb138c2b3463ce9e3d1501 SHA-1: 3f61581d19c8f80c245d47f18180854b4d09cbf7 SHA-256: 4bd40db1b605c5dcd946b48cf358cf90e9e955d2d5d2372942e33240f076e2f6
160 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.com' domain. The document body, though heavily obfuscated, suggests a lure related to an 'online manual', which, combined with the link farm and the 'ADVANCE_FEE_SCAM_LURE' heuristic, strongly indicates a social engineering attempt to trick users into visiting a malicious site. The presence of numerous PDF links further supports the link farm detection.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.com/wb?keyword=ootp%2020%20online%20manual
    • http://files.thehempforce.com/uploads/1/3/1/0/131069886/4195033.pdf
    • http://files.mairibudreau.com/uploads/1/3/0/7/130776864/ziwawajobigogefivane.pdf
    • http://files.findingedenphotography.com/uploads/1/3/1/6/131606861/tuzuleremobafum_razetotutene.pdf
    • http://files.mercymagnified.com/uploads/1/3/0/8/130874432/369daf55b833c8f.pdf
    • https://binutizazal.files.wordpress.com/2020/06/62445833879.pdf
    • https://xoleliv.files.wordpress.com/2020/07/91333640953.pdf
    • https://tedazusalutu.files.wordpress.com/2020/07/jemorizuwoguverobemirutu.pdf
    • https://jurovofat.files.wordpress.com/2020/06/xemifagamuluwovuduxipu.pdf
    • https://rafuzakaxoru.files.wordpress.com/2020/06/suxedefezezisapilipor.pdf
    • https://xazupineku.files.wordpress.com/2020/07/34975670397.pdf
    • https://sonizoziva.files.wordpress.com/2020/07/seladowoxosomido.pdf
    • https://visisawaxug.files.wordpress.com/2020/07/rakano.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/13550511094.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/21654624494.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77160317291.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/14814514130.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/72476484203.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/64633149342.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/lavino.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_off0000a6da.bin
972c945c92596aafa1edcbe6fc5368cf872588a241473e8376d332616b558f10
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DA 4872 bytes
font_01_sfnt_off0000b74e.bin
7b4e76da1ee5e1806ed675040f879c8a4c21f9a7464b009653b8a724a89e78d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xB74E 10320 bytes