Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a8616996e830db…

MALICIOUS

PDF

63.0 KB Created: 2020-09-17 05:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06f86dc1a965706b1222b532b0167bf2 SHA-1: 7412cb46abb2d33f228f38f1537336091db3fc6c SHA-256: 38a8616996e830db0cc189d7de22dd5072a7228689f6d4e44f6386ea8c005a4e
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. Additionally, another critical heuristic indicates a PDF link farm, suggesting a broad distribution effort. The presence of a 'download button' lure further supports the malicious intent. The primary malicious URL identified is https://ttraff.link/wix?keyword=fundamental+counting+principle+worksheet+with+answers.

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.link/wix?keyword=fundamental+counting+principle+worksheet+with+answers
    • http://galomeg.utahact.com/uploads/1/3/0/7/130740178/4106404.pdf
    • http://xinano.kentfong.com/uploads/1/3/1/8/131871699/bubid.pdf
    • http://files.tachelesstmk.org/uploads/1/3/1/3/131380094/7652265.pdf
    • http://nexenibat.firststatebaptist.com/uploads/1/3/1/4/131406710/9011247.pdf
    • http://files.pianoincolor.com/uploads/1/3/0/7/130776111/kufimopiwubazinogi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/multiple_skype_launcher_3._8.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/ditenetafijixipem.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2480/files/ethiopian_airlines_crash_investigation_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/52042186660.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6064/files/62113780890.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/juvovowotax.pdf
    • https://cdn.shopify.com/s/files/1/0451/2520/6169/files/cbse_class_9_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/evolve_resources_for_saunders_comprehensive_review_for_the_nclex-pn_examination_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/xuvibokiposej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aebf.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEBF 2828 bytes
font_01_sfnt_off0000b8b9.bin
9f75db4626a6cd0c4d21fe51c790adf8613f6b17f77a8931d8d26802e5720440
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B9 5600 bytes
font_02_sfnt_off0000cbaf.bin
0382efef654ea1737040d2b1355a9a07e8bef452424e03c58fc1d7f6f4f57ef0
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAF 10372 bytes