Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de508636a3b6981…

MALICIOUS

PDF

92.9 KB Created: 2020-08-16 10:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03a360c3e9a149d9ffbaa6b588403f96 SHA-1: 4b409dfaf352a63329dc015d4e301dbf9d979e98 SHA-256: 1de508636a3b6981ad706f7fc54dc503835071b299dddb57bbee898aecfb53b2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links, many hosted on Shopify, which is flagged as a link farm. The primary malicious URL is 'https://ttraff.com/pify?keyword=the+multivariate+normal+distribution+tong+pdf'. This suggests a phishing or scam attempt disguised as an academic document.

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=the+multivariate+normal+distribution+tong+pdf
    • http://mijive.paulwilkinselectricien.com/uploads/1/3/1/3/131379295/xavirasolakilox.pdf
    • http://kobomajos.jamesbrearley.com/uploads/1/3/1/3/131380005/giwavunipufosuf_rogixukapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/25686143618.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/comensalismo_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/70459630296.pdf
    • https://cdn.shopify.com/s/files/1/0434/6694/8773/files/83550695369.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/votidivulan.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/33417968539.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/docker_kill_all_running_containers.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/tahapan_sintesis_protein.pdf
    • https://cdn.shopify.com/s/files/1/0432/0008/6180/files/jiwidenesipodexur.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/approved_house_plans_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/54925667670.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010298.bin
bb089d256733b8e4ba1f670911c3a839f0bfe3ece03d606f1f49f9c219b7656a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 5604 bytes
font_01_sfnt_off0001157f.bin
47f2fac04eb6098d9bc621f77861ecdafde6a52d44213cc8466cbd694e004c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1157F 18104 bytes
font_02_sfnt_off00014ed9.bin
f1e14eaf7557e9ef7c8a2300f1605a5bf807ce2a47b40879200bdc05ab837fa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED9 16744 bytes

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