Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d16426d6aca60c…

MALICIOUS

PDF

33.7 KB Created: 2020-09-16 00:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 030210457d62003aa4ee185e9e621b22 SHA-1: 013ea4e0142f359392149fb81deaf894cf53cebe SHA-256: 26d16426d6aca60cbfaa9f823dd19510f8281280e6df566c4393695b8b1c4899
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with the primary redirector pointing to a known malicious URL. This suggests the document's purpose is to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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.cc/wb?keyword=spongebob%20boat%20o%20cross%202%20hacked
    • http://files.nchep2018.org/uploads/1/3/1/3/131383613/1798969.pdf
    • http://files.myshopexpert.com/uploads/1/3/1/3/131378950/vorovagomavisix-vibikaxega-foripexidafu-xixatupekemum.pdf
    • http://wureti.iahaschools.com/uploads/1/3/2/7/132740214/486ccdb31cc3e4.pdf
    • http://jekuvul.thefrontporchgardensandgifts.com/uploads/1/3/1/6/131637279/xoxaf.pdf
    • http://files.phdnd.org/uploads/1/3/0/7/130739415/fixogemujo.pdf
    • http://gajosiwuw.performcenterstage.com/uploads/1/3/1/4/131406665/mejudesux_pozupesa_pamedopi_pixevasona.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/bezuwajokavesenoras.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/23049549002.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/diarios_de_clase_ejemplo.pdf
    • https://static.usrfiles.com/ugd/b5aed9_258e70a1a6254c06b704f948f57d2b8a.pdf
    • https://static.usrfiles.com/ugd/d17951_db8091c82df5467cb2e960ed0f1e98d3.pdf
    • https://static.usrfiles.com/ugd/d216cb_ca41dd0ce14e411e97ec20e5e563c298.pdf
    • https://static.usrfiles.com/ugd/8c5bc8_a0017c9ece624c95b175c5ca2ef82710.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_off00004500.bin
512abff519c90587af3f7a5568f9a2a845add07d063c594658ca314ab79936b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4500 5740 bytes
font_01_sfnt_off00005880.bin
050f7bc01102d806989629e208b1694083c670cea7677af0b6f63749402e2438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5880 9820 bytes

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