Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c53dd1a13ba88e5…

MALICIOUS

PDF

43.3 KB Created: 2020-08-06 02:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f339706d0c86ca446405c98e59fc042 SHA-1: 7ea718fe35ec2b186357ad77ffe86821fca92c17 SHA-256: 9c53dd1a13ba88e5d6e7aa18c3bcaae9289f6b88d88cbe91af843af9a647f3cf
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The document body, though partially corrupted, suggests a lure related to academic content ('isomerism in transition metal complexes pdf'). The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or redirection attempt. No scripts were extracted from this sample.

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=isomerism+in+transition+metal+complexes+pdf
    • http://paforen.revmeganlloydjoiner.org/uploads/1/3/1/4/131438405/805365.pdf
    • http://kitex.msgoodwin.com/uploads/1/3/1/8/131872225/475139.pdf
    • http://files.nachomamanc.com/uploads/1/3/1/3/131382092/4d0253.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94192334972.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/jujeputawogugokagike.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/vejapizosisexokaruv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/14012433579.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/rirovofodolevezovezozija.pdf
    • https://cdn.shopify.com/s/files/1/0433/2866/7816/files/32395433177.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/bupixu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/81367863757.pdf
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/8049380298.pdf
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/37467638560.pdf
    • https://cdn.shopify.com/s/files/1/0437/7808/0925/files/dmv_practice_test_nj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/warorenajazofupexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/99424231211.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_off00006a4d.bin
17fb6e9a7f2ed1fed0bdc271c8e582a2499604904b19d95c79b387a5567fed24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4D 5308 bytes
font_01_sfnt_off00007c43.bin
4bda481e551f5b7f1f06d1ebfe6bec5b7010116aab472069e0c30a13a5e79870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C43 10604 bytes

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