Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ffe2f681353b2f…

MALICIOUS

PDF

48.4 KB Created: 2020-11-02 10:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59351fa6d5ab66fefbb1aff8521f628f SHA-1: 938e2fad9591365cc55660eacc7cd11a5637bc1d SHA-256: d7ffe2f681353b2f78cf2f7af2cec0a86773dc8662f6066eebcf3e4e43a9911f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a malicious site or download. The document also features a large number of external PDF links, suggesting it is part of a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly indicated maliciousness.

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.link/123?keyword=bear+canyon+senior+living+center+albuquerque
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdf
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f8aae8f76b48.pdf
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/ropimidimefezigunul.pdf
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/4f08e28b0c.pdf
    • https://cdn-cms.f-static.net/uploads/4421199/normal_5f9844a165813.pdf
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/64162d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0505/0341/8026/files/pizowuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/cuestionario_del_modelo_servqual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/harrison_editia_14_romana.pdf
    • https://cdn.shopify.com/s/files/1/0507/2955/0015/files/8_ball_pool_unlimited_coins_apkpure.pdf
    • https://s3.amazonaws.com/duzexefemosaxe/dnd_grung_monk.pdf
    • https://cdn.shopify.com/s/files/1/0498/8561/0173/files/zidinu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5623/files/fefitef.pdf
    • https://s3.amazonaws.com/fasanag/temajifewuru.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000731c.bin
1c2f410ba16bbc5d139612cf402b7e1eabe38518cf0da072e410346e3119c060
pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 5444 bytes
font_01_sfnt_off000085be.bin
0a53050c02f386250335c3a92751903e681a0c3aa534aa208ddab36cd73ea4ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x85BE 14672 bytes