Malicious PDF — malware analysis report

Static analysis result for SHA-256 971910a89dacd233…

MALICIOUS

PDF

66.2 KB Created: 2020-11-18 13:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a09637b5ccbbef84326bc441222bd735 SHA-1: 0f53010e3cfef60a1f0f8ff3e0dd900b07742b0a SHA-256: 971910a89dacd23328d79207f04eec4f21ad26342a5a33867c8b957102e96bf0
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically `ggtraff.ru`. The document body, though heavily obfuscated, suggests a lure related to financial examples, likely to disguise the malicious intent. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/aws?utm_term=time+value+of+money+examples+with+answers In PDF document text
    • https://sokonova.weebly.com/uploads/1/3/4/3/134322069/8283885.pdfIn PDF document text
    • https://kogewovedof.weebly.com/uploads/1/3/4/3/134339257/8132885.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/faxeporizunud-vatam-sujedegexodenon-golatixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nitirew/aisc_steel_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/pariveruremum.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/vufigorijatula.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/wonder_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/double_shower_curtain_rods_curved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c6cb43f-001c-48c1-9033-48247d5ef72d/ipad_2_16gb_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e080a593-e403-4754-8584-f7cf239e2cd8/xewovojive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6cfa36-074d-44d5-be26-31e24c12dd3d/91241537608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc57967a-61f3-4311-ba42-63900684a1da/graphic_design_portfolio_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d076e25-8db5-4660-8bfc-a2c04b2c75b4/xivoboxi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB779 5292 bytes
SHA-256: 06804ff4cfd21ee9be2f40d4436b6eeec530444bbd9709aedff87bb148e4dab7
font_01_sfnt_off0000c965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC965 10352 bytes
SHA-256: a037b1548eed0d504f2dafd54f9f60bd46c40ffec1e653314899bc8e8cd19aaa
font_02_sfnt_off0000ec33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC33 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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