Malicious PDF — malware analysis report

Static analysis result for SHA-256 c383f1c510e235df…

MALICIOUS

PDF

43.4 KB Created: 2020-08-25 02:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02def08641959c4f534723e773b60c4e SHA-1: 3e107297a8f61e62e604c0808c76e8b53efb3a1f SHA-256: c383f1c510e235dfe24ec7cd4c8bb619413fc25776b2282e82da9b001b51e1e0
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though garbled, contains the phrase 'Grounding sheets for bed' and the malicious redirector URL, suggesting a lure to a phishing or malware distribution site. The ML classifier 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.cc/pify?keyword=grounding+sheets+for+bed
    • http://moxagi.missballantyne.com/uploads/1/3/1/4/131482995/pefifobe-wobawidul-voziwigebizam.pdf
    • http://files.weddingsbyedna.com/uploads/1/3/0/7/130775462/8d69d154c808ce1.pdf
    • http://pepiwaxod.maynewman.us/uploads/1/3/0/8/130813834/xotosatiwax-vazomosojug.pdf
    • http://zidigu.quinkydinkdonuts.com/uploads/1/3/1/4/131437657/ligasajosokininef.pdf
    • http://files.caitlinrobin.com/uploads/1/3/1/6/131637309/7565193.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/wedab.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/academy_of_management_proceedings.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/nagimedajedibokofimit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4534/files/tavewegasagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7626/3841/files/45851396827.pdf
    • https://cdn.shopify.com/s/files/1/0433/2994/5758/files/31931814042.pdf
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/32108644703.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/diruzotevepelotemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/8912788499.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_off00006b73.bin
f89fcb7f32b8892ec2f29fd6f45926e17b2d7bd272ab10fad60936efd38df7c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B73 5096 bytes
font_01_sfnt_off00007cc6.bin
603bda3211c9db7d86d14131a92e4c275ff1a0ca1cfbf9236eb4976d5f388053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC6 10556 bytes

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