Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd943f623522d90…

MALICIOUS

PDF

44.1 KB Created: 2020-08-08 19:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba44c4b349d0634f4ad93427d74cdb05 SHA-1: 15dfe43787fce35b38297872dd7c3165fafdba93 SHA-256: ebd943f623522d900f15122640c9a85704261944ccc7a665ddd9ef22234e848e
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the URL that triggers the redirection. This suggests a phishing or SEO poisoning attack aimed at directing users to malicious content.

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.com/pify?keyword=bartholinite+et+grossesse+pdf
    • http://files.firetrailers.com/uploads/1/3/1/4/131453355/bazatipetu.pdf
    • http://files.cosmeticstandards.org.uk/uploads/1/3/1/6/131606128/wexefasab.pdf
    • http://files.myclassicmercedes.com/uploads/1/3/1/6/131606878/d720ccbf525180.pdf
    • http://files.livybella.com/uploads/1/3/2/7/132741109/7624280.pdf
    • http://files.rehabmri.com/uploads/1/3/1/3/131384583/nowux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/lurapupinuxuxuga.pdf
    • https://cdn.shopify.com/s/files/1/0449/9944/2590/files/general_mathematics_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/zeferul.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/30189934129.pdf
    • https://cdn.shopify.com/s/files/1/0428/1093/3414/files/sinunumi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9534/9666/files/exploring_psychology_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/4969/7959/files/mubuxeditajisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/7841957940.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/zivokabezer.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/bozifutagopawijuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/pemukusu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/5809740506.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7345/files/duderesapimoluvi.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/
    • https://cdn.shopify.com/s/files/1/0431/1983/7345/files/dude

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c10.bin
a5860cdbb0bc4eaa02b6ccc82b907c145baa4ea6ea55663731081c609116ae97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C10 5352 bytes
font_01_sfnt_off00007e43.bin
8842dffb132d00530a886992d9247d8107688ed27e1c233e060015cacb3927fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E43 11556 bytes

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