Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcd61fcd72b4364…

MALICIOUS

PDF

42.1 KB Created: 2020-08-04 21:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a710ecd2b558a8d67e280c06ed1ae7c SHA-1: 510530b61b57327f449abc28603659a4d5e8bbb6 SHA-256: bfcd61fcd72b436485e027992cf4b43ba7559f21f90a8652ce62b37023c77fa0
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Accord salud 210 cartilla pdf'. The presence of a link farm and a callback phishing lure further supports a malicious intent. The primary malicious IOC is the redirector URL which is likely used to funnel victims to a phishing or scam page.

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.
  • 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
  • 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=accord+salud+210+cartilla+pdf
    • http://fosex.thisdreamersrealities.com/uploads/1/3/2/6/132696111/5f77e5.pdf
    • http://files.diypaintguy.com/uploads/1/3/2/6/132695633/1049055.pdf
    • http://goriviwow.christopherwrench.com/uploads/1/3/1/4/131438477/2362604.pdf
    • https://cdn.shopify.com/s/files/1/0428/4012/9692/files/padomojuravuzagagon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4631/files/luted.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/24249289191.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/rojimaguze.pdf
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/72034944975.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/44097572437.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/nuvazogitudezisabuwitu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/58476340959.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/42491923536.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/kinds_of_adjectives_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/69284431315.pdf
    • https://cdn.shopify.com/s/files/1/0438/8398/7096/files/podexufubogidutawatatik.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_off0000641c.bin
b3c966899c746f7b26ae06f4336412815a2eda5c84186956e4a118ec68d8b859
pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 5464 bytes
font_01_sfnt_off000076c6.bin
595e98df55862bd4a068206f57361ba9325f5aea99159e044c89826f866eb992
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C6 10800 bytes