Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e55f48e220875f5…

MALICIOUS

PDF

50.5 KB Created: 2020-08-28 13:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a014639b772fcb7ae2c156001d06270a SHA-1: 0c3de20b2262c12f230c9efe84951f5fcd4e7217 SHA-256: 4e55f48e220875f58b2a025b640da28a92cd0d8906f5deb46becb53864d811be
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ballon+de+contre+pulsion+intra+aorti. The presence of multiple PDF links, including those hosted on cdn.shopify.com and other domains, indicates a strategy to distribute content or lure users through a network of linked documents. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=ballon+de+contre+pulsion+intra+aorti
    • http://luvadi.gimmethelodown.com/uploads/1/3/1/4/131438044/dipaxawazonol.pdf
    • http://ladofuwo.tandersonart.com/uploads/1/3/0/8/130814471/1686387.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/merilyn_manson_the_nobodies.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7205/files/lsat_logic_games_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/close_up_pics_level_11_all_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/point_estimate_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/82079655511.pdf
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/74592168057.pdf
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/47912810567.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/12696219695.pdf
    • https://cdn.shopify.com/s/files/1/0436/1368/3874/files/simple_english_vocabulary_words_with_urdu_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1311/files/48163151565.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_off000085df.bin
8c429c846cf5cc96ce5e362ce38ca592e9d9841d71efd71a580820740349d670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85DF 5116 bytes
font_01_sfnt_off00009748.bin
f087b96261bfc9daaab4cd56b5f0503ff31c2a2967fa7cd1ae3c514973b2832b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9748 11840 bytes

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