Malicious PDF — malware analysis report

Static analysis result for SHA-256 726dd2edbcc460ab…

MALICIOUS

PDF

38.2 KB Created: 2020-08-14 11:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36f79ce6ba05d9ba01a5f60ee81ebd6e SHA-1: 88fbf6a9dc723eef7a8bf92267898c7273f1f2ed SHA-256: 726dd2edbcc460ab81b5c0dc2c3377524efe8b6e875f35f5f75f26801d8ab7d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The embedded content, though obfuscated, includes the malicious URL and several benign-looking PDF links, likely to mask the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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/pify?keyword=funny+tv+ads+video
    • http://files.evaadorned.com/uploads/1/3/1/6/131607163/3792001.pdf
    • http://zaritisug.ingerlene.net/uploads/1/3/0/7/130776031/kovazexate-rivif-pudapuveriki-rawujiraguxel.pdf
    • http://files.tuhstakeout.com/uploads/1/3/2/3/132303238/4574bc.pdf
    • http://files.friendsofottawanwr.org/uploads/1/3/0/7/130739987/wofoviwizoraxumitofu.pdf
    • http://files.shopgbmp.org/uploads/1/3/1/1/131164236/lepolubazo-rufunurivofafi-wukumaxu-getavowebetiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/wii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/39562464197.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/moboletoxesukegog.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/farmall_300_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/2013/9170/files/kadavijon.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/27581934777.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/47883242184.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/93813721618.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/how_to_get_through_victory_road.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/80048038815.pdf
    • https://cdn.shopify.com/s/files/1/0432/7102/8896/files/vegomejiporotaj.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_off00005a4b.bin
3c6697f6af52ecb891ae13f529586e7b28959bcdd8cd9c12c39d440df06cfb5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4B 4808 bytes
font_01_sfnt_off00006ac5.bin
b50a067109d05108055f17d98994ad202200916b728f5fcbe34e1e3930a99ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC5 9740 bytes

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