Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90965dc1bb470c0…

MALICIOUS

PDF

45.5 KB Created: 2020-08-19 08:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b35135df14143b86d1e4e39a4b0842ba SHA-1: ee6d6ff6f76850ea8c4d453aba81b90d29180de3 SHA-256: b90965dc1bb470c0f7de50ec1ba9998d7b4862fc94c3091faf4770ef10dd4b08
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for accessing online forms, directly correlating with the malicious URL. The presence of a password-protected archive lure suggests a multi-stage attack where this PDF serves as the initial delivery mechanism.

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.
  • 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
  • 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/pify?keyword=access+online+forms
    • http://files.huckleberryridgefurniture.com/uploads/1/3/0/7/130740149/2275855.pdf
    • http://xemexu.nib-ex.com/uploads/1/3/2/7/132712315/8810937.pdf
    • http://files.bittersweetgardenclub.com/uploads/1/3/0/7/130775866/b6e5d8.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/52108623106.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0580/files/lusekovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/zobuvavavinomizeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/93022363776.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/fitbit_charge_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/worogadanisubugutitedi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/irs_form_capital_loss_carryover_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/12578759726.pdf
    • https://cdn.shopify.com/s/files/1/0439/3412/2139/files/69424183131.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/husqvarna_automower_435x_awd_bedienungsanleitung.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f26.bin
07efd4b5ce35fe43d562a47bea6ca2be7e52a32f6dbf0d49a2a72276c44a66d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F26 3016 bytes
font_01_sfnt_off000069e1.bin
b463bd2c86f081e43fb6aee681202b6dfe55c0f89ef550369fee31f006bea438
pdf-font-stream PDF embedded font (sfnt) at offset 0x69E1 4512 bytes
font_02_sfnt_off000078f8.bin
88c0733e488325801d29228c0f2e29b22539fcf5a6001fb3ad32d9b2cbdddd42
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 9924 bytes
font_03_sfnt_off00009ae0.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE0 4324 bytes