Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e271d66a5c01ea1…

MALICIOUS

PDF

53.0 KB Created: 2020-07-09 12:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaf269c3438a074770eba29b49ae62c0 SHA-1: 2128e353d438e6c7892eaaab394b658dc4c6f862 SHA-256: 6e271d66a5c01ea10f8268f1842589203ecea141273d82641eeacad6cc7ce39c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to a known malicious infrastructure, suggesting a phishing or SEO poisoning campaign. The document body and embedded links are designed to appear as educational material, likely to trick users into clicking through to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=angles%20in%20a%20triangle%20worksheet%20ks3%20pdf
    • http://files.moenada.com/uploads/1/3/1/6/131606395/gosuwawegumuto.pdf
    • http://files.gainzadesign.com/uploads/1/3/0/9/130969809/6581120.pdf
    • http://files.mairibudreau.com/uploads/1/3/0/7/130776864/ziwawajobigogefivane.pdf
    • http://files.lydiamartinstudio.com/uploads/1/3/1/6/131606144/652ffecfed11.pdf
    • http://files.derekleebarton.com/uploads/1/3/0/8/130814189/cc6cb6.pdf
    • http://files.avienteconsulting.com/uploads/1/3/1/6/131606113/sapakepewejoxelirigi.pdf
    • http://files.nnhst2.org/uploads/1/3/1/3/131379612/lufuxofuwusuwufaposi.pdf
    • http://files.westernwc.info/uploads/1/3/0/9/130969300/9471533.pdf
    • http://files.andrheagoertzen.com/uploads/1/3/0/7/130775497/9073437.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://notetel.files.wordpress.com/2020/07/wazigunaves.pdf
    • https://pojupemi.files.wordpress.com/2020/07/kolopowarujezamameneripi.pdf
    • https://muvegotapega.files.wordpress.com/2020/07/sebele.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jakenetukuzalavat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c83.bin
4b881b4c69b17b9a5682decd2532640e8ad208734c71619f81c29fbdb65c8b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 5400 bytes
font_01_sfnt_off00008edf.bin
2e52ea5bf11b468482129af2e83ee8972aa212a59871fb129d144b1b3f5c7b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDF 3128 bytes
font_02_sfnt_off00009ba3.bin
14719ff955f44593b2405eae04a9f3f194f5fa3b836adec5254b6381084c5231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA3 13720 bytes

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