Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a61c48a60ac5cc3…

MALICIOUS

PDF

40.9 KB Created: 2020-08-20 02:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dfc952c635b297dbc1e31b951a43981 SHA-1: 3a602996e5c3b53fbd9d73a8ea63b774f2f57eab SHA-256: 9a61c48a60ac5cc3a1b1a115efadcb3cc0d74821ac370ae7f4e0a76eff0a34f4
150 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to potentially malicious redirectors or content farms. The document body text, though garbled, includes the phrase 'Andela home study answers' and a URL that appears to be a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or content-scraping 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=andela+home+study+answers
    • http://rakizikew.13thguardspoltavaskaya.com/uploads/1/3/0/8/130873851/9108948.pdf
    • http://noxemog.gopherstatefire.com/uploads/1/3/2/3/132302963/genirobesijosavobina.pdf
    • http://sonopidef.roseworksconsulting.com/uploads/1/3/1/8/131871729/zutosikikote.pdf
    • http://wagif.thedreamblog.com/uploads/1/3/1/4/131453251/1532646.pdf
    • http://files.heatherrafia.com/uploads/1/3/1/8/131856992/demujazezegovezigila.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/jeporatekerij.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/banaras_wala_remix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/21160497083.pdf
    • https://cdn.shopify.com/s/files/1/0431/4362/6912/files/ratidatiseze.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/html_to_asp._net_core.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/82821254427.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/didisimofebukapemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/katangian_ng_retorika.pdf
    • https://cdn.shopify.com/s/files/1/0459/5551/4527/files/15382214659.pdf
    • https://cdn.shopify.com/s/files/1/0435/2504/6423/files/socioeconomic_status_and_academic_performance.pdf
    • https://cdn.shopify.com/s/files/1/0439/2671/6584/files/gesixuvekimiwer.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_off000059d2.bin
5ce588ff636e3e14f3ebc4d339cb35188a776aeebea66d53b800675ba66a3b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D2 5248 bytes
font_01_sfnt_off00006b8d.bin
6f5da75c7b108e8260b770aa881f8994430cea0ca60b4c5f61f918830609cb52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8D 13660 bytes

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