Malicious PDF — malware analysis report

Static analysis result for SHA-256 26210106c7d9fa3a…

MALICIOUS

PDF

46.4 KB Created: 2020-08-07 06:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51f2aad5f4609078a1bef4dfacb5f87f SHA-1: 79138569c7692acd693ba39a2f8dbd9bba1b8e46 SHA-256: 26210106c7d9fa3aa1e23adb5e8745349da86137c469d41fc6054271df760f00
168 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'PDF to Word converter' and includes a link to a redirector hosted on 'ttraff.ru'. This redirector is known to point to malicious infrastructure. Additionally, the document instructs the user to install remote support tools, indicating a potential social engineering attack. The presence of numerous links to Shopify-hosted PDFs suggests a link farm used for SEO poisoning to attract victims.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=pdf+to+word+converter+apk4fun
    • http://files.grizzyathletics.com/uploads/1/3/2/6/132681033/8485945.pdf
    • http://files.raleighgroomingacademy.com/uploads/1/3/0/8/130814169/fizuta.pdf
    • http://files.hanyidesigns.com/uploads/1/3/0/9/130969710/3fe9f25ea755f.pdf
    • http://files.allanpierce.com/uploads/1/3/1/3/131380728/viniwuk-larevijexi-fegepukawoderog-romeseposubunaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/89561834731.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/pufufulovasiwuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4904/1563/files/24940267059.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/minunedegexanodezoxaruva.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/lufeladow.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/long_walk_to_freedom_the_autobiography_of_nelson_mandela.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30072581460.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/59478851435.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/pebidaturupijerodurid.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3794/files/how_to_play_cia_files_on_3ds.pdf
    • https://cdn.shopify.com/s/files/1/0435/7164/2527/files/45932860486.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/inverse_of_a_3x3_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/43822431004.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/laruw.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_off000076de.bin
eba4ef0ba83bf5432ade4845441b260624b4a7434efbc1afcc3d2bb6123489dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DE 5244 bytes
font_01_sfnt_off000088eb.bin
599fbfb4133079b3b521161adbe9003e5fbf069088d9d9a6b2a039beabbb5f3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88EB 10364 bytes

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