Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63f2c4784f2878a…

MALICIOUS

PDF

47.8 KB Created: 2020-08-24 21:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd8431f8bc585d7ffc58e6f7cec5e055 SHA-1: c6dc89ec9c77bb95e10faf87753f87ff0cb382f0 SHA-256: b63f2c4784f2878a2c82ca1d060ac4c460e8f154994b0d7a69ca2de380b6b6b2
148 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Cidco home online form 2018' and includes the malicious URL, suggesting a lure for users to click on the link. The presence of numerous external PDF links also indicates a link farm strategy, likely to improve search engine ranking for malicious content. The heuristic 'SE_INVOICE_LURE' further supports the phishing pretext.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.ru/pify?keyword=cidco+home+online+form+2018
    • http://files.toddurban.com/uploads/1/3/0/7/130775707/5707606.pdf
    • http://files.gameboydrew.com/uploads/1/3/1/6/131637562/3512568.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/thani_oruvan_movie_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/gifuxaloli.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/all_color_rose_image.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8084/files/nemonejomenevogikasupogod.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/46249556517.pdf
    • https://cdn.shopify.com/s/files/1/0438/6933/9808/files/18550364404.pdf
    • https://cdn.shopify.com/s/files/1/0434/9670/2104/files/1785775645.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/dowufekigufikegazetos.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/7203153346.pdf
    • https://cdn.shopify.com/s/files/1/0446/6517/6217/files/58756353205.pdf
    • https://cdn.shopify.com/s/files/1/0440/1758/2230/files/zinalema.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/apollo_100_joy_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/8448/8607/files/doterra_bergamot.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_off00007619.bin
b89dbf2b240040028a665dbcbbfbbaf846700d7d811ad688df6f4b9b5e31eda4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7619 5300 bytes
font_01_sfnt_off000087fc.bin
89d00a442eec7c7896488b9ea0d0c6df412bd561c2be670c3d9af83eab4cdbce
pdf-font-stream PDF embedded font (sfnt) at offset 0x87FC 13472 bytes