Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23c1f3cf33a49f9…

MALICIOUS

PDF

39.1 KB Created: 2020-08-14 01:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf4a53bd2190c3364ae4abdd76381b8d SHA-1: 2df9fd2432bf0971bebdefc9208a0f96eb57cc65 SHA-256: a23c1f3cf33a49f9a2e19e8cd68b5d7074020bd636bd3ba98d50c5f9d8d17cd5
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=beat+maker+apk+mod, which is likely used to redirect users to further malicious content. The document body contains garbled text, but the presence of numerous embedded links, including the identified malicious one, strongly suggests a phishing or malware distribution attempt.

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=beat+maker+apk+mod
    • http://files.ezekiel37ministries.org/uploads/1/3/1/4/131455475/f98cfb.pdf
    • http://files.releaseyourfullpotential.com/uploads/1/3/1/0/131069819/dujaxewum_zerevezo.pdf
    • http://files.85groupphotography.org/uploads/1/3/1/8/131856917/4203350.pdf
    • http://files.elizabethsfarmhouse.com/uploads/1/3/0/7/130739376/69111771a.pdf
    • http://neravafo.lovemehemp.net/uploads/1/3/1/8/131871871/menokumiwapemaje.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/vigexixoxisosad.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/dosazaxazi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/44139904641.pdf
    • https://cdn.shopify.com/s/files/1/0438/4053/6736/files/vebomupekogumujo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7948/files/mcdonalds_free_wifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6133/8531/files/62215116337.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/topufabox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/pusunaxuzazalowi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/biblia_estudio_plenitud.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/29233034625.pdf
    • https://cdn.shopify.com/s/files/1/0434/6347/5352/files/xonawotodapenenifum.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/74485388564.pdf
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/72591473519.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_off00005bea.bin
fccb825c6e0e6c6d528221c1d4b22cd1557d42f809a02b85a7769e5614356c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEA 5008 bytes
font_01_sfnt_off00006cd9.bin
5ee8f61949024eddacfa5726c5bff860dad3c04997fec0977bd62a9c57edde54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD9 10204 bytes

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