Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af01e695c4d2020…

MALICIOUS

PDF

51.1 KB Created: 2020-07-23 00:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0569c44adced7399ccd1d8cb3c3b23fa SHA-1: cea1747f7218629ba631ecc5830ced022bd0d115 SHA-256: 7af01e695c4d2020ddbebf792b2fb5baa8319c13ea2a4cd536c04e1e2e925174
150 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, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.ru/pify?keyword=bandung+tempo+dulu+pdf', is identified as a known malicious redirector. The presence of numerous links, including the malicious one, suggests an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=bandung+tempo+dulu+pdf
    • http://files.sanbrunogolf.com/uploads/1/3/0/9/130969003/berazede.pdf
    • http://files.reillysirishbakery.com/uploads/1/3/0/8/130814492/likadetawol-soxuj.pdf
    • http://files.byyoursidepet.com/uploads/1/3/1/4/131453934/daluzepezejilumuwava.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/20983041218.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/vokadigosu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://wedumokub.files.wordpress.com/2020/07/zutojefo.pdf
    • https://ralifozisu.files.wordpress.com/2020/07/jubug.pdf
    • https://jesipesazep822402148.files.wordpress.com/2020/07/9002471678.pdf
    • https://zanenemavil.files.wordpress.com/2020/07/puxivokogexolatozuzari.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/jofudujoroxixevinurefiwov.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/70412840475.pdf
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/5512126960.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1199/files/rusasidom.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/33308207851.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/89922803174.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/vakijanopoxe.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_off00008a1d.bin
64fe0a662fcb0c75a1bdd289d2f784b6f2d947b910814ed4649957ebbaf0548b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1D 4968 bytes
font_01_sfnt_off00009af2.bin
526bba36856e3db82986e58fc95227a6b7fc314a2c5cc62bb6ebda427c8609eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF2 10748 bytes