Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c059c9c5ce5ffe…

MALICIOUS

PDF

47.4 KB Created: 2020-08-10 21:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f2db95c2679a08db27777bb6f1b7819 SHA-1: a835ac2f1ff5bfe77b3fa8bf0c4b29aaa25cd18a SHA-256: 24c059c9c5ce5ffe91d703e2453f897880b37c9bf15956c1fb9394ef25b422ef
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic identifying it as a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=instrumen+survei+akreditasi+puskesmas+2020+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious sites. The file is generated by wkhtmltopdf, a tool often used to create PDF documents from web content, which aligns with the link farm attack pattern.

Heuristics 3

  • 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.
  • 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=instrumen+survei+akreditasi+puskesmas+2020+pdf
    • http://files.glasserpreschool.com/uploads/1/3/2/6/132681294/bobegisovolakiwadi.pdf
    • http://files.fetedu.com/uploads/1/3/2/3/132302940/5163290.pdf
    • http://files.englishmastiffrescue.net/uploads/1/3/1/4/131437669/3981c074c.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/vidibozafodila.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1562/files/70132230602.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/xatogamixidulofixop.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/zawufipetun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/business_operations_manager_resume.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/pamajiledapiboruborad.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/53515276948.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9274/files/zujijalemolasexigope.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/78007977418.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/8918827047.pdf
    • https://cdn.shopify.com/s/files/1/0440/1404/3294/files/human_anatomy_for_medical_students.pdf
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/dosatoraweb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/50323966817.pdf
    • https://cdn.shopify.com/s/files/1/0429/6012/6118/files/html_link_a_github_file.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_off00006b9a.bin
e7ec95ccf021ee928cffc981ae06e7465c44a261689e3e9722c3007e105a1833
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9A 5260 bytes
font_01_sfnt_off00007d5b.bin
3a35e5f43eedcf98deca7e5c611936a6352a2e86391253c896a0de7e458a10c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5B 11232 bytes
font_02_sfnt_off0000a232.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA232 4324 bytes