Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c82a7d0b7f36aaa…

MALICIOUS

PDF

51.9 KB Created: 2020-08-21 22:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84686012b5ec63661461186b3e56c30a SHA-1: 5592b35fe78c348e90d7562e27f1a4a7975313dd SHA-256: 2c82a7d0b7f36aaa45458d65b037a5a5d8ba9c24e68f7dff5dd24a9236ec6825
208 Risk Score

Malware Insights

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

The PDF document contains a lure related to an admission form and includes a critical heuristic firing for a malicious redirector link. It also exhibits a link farm pattern, with many URLs pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the primary malicious URL and several other PDF links, suggesting a phishing or redirection attempt. No scripts were extracted, limiting the analysis of direct payload execution.

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=tup+admission+form+2019
    • http://nosoto.remembrancestars.com/uploads/1/3/1/4/131438044/sakeluram_regetetolekuk_wotogope.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/menimobutu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/501223527.pdf
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/25633193342.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/metabolism_of_sulphur_containing_amino_acids.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/gopekukugozegizanofiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/85416884656.pdf
    • https://cdn.shopify.com/s/files/1/0455/7596/2789/files/adverbs_of_manner_and_modifiers_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0444/5339/6647/files/jumemowefokegorubujoguso.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/xaranelugerikemur.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/gigazu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/56009213849.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_off0000814d.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x814D 2828 bytes
font_01_sfnt_off00008b47.bin
3e394ba57fd974fbe5ccb5cf8865e7c58b5b9d970679c487842d9ad740534bd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B47 5584 bytes
font_02_sfnt_off00009e27.bin
10c60901520aa85ed51ff94ec359bc3744d4c65032a0a49a5705532058f11dbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E27 10036 bytes