Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2ef21c0e36e330…

MALICIOUS

PDF

44.6 KB Created: 2020-10-14 16:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4f66ee00e43d180abba26abf9f2e9d50 SHA-1: 909409610133071631a3d65fc0fd924275f46694 SHA-256: 2a2ef21c0e36e33007e3cb03caa8d1063d33465c001e3d9013e164b9a5bd2485
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, suggesting an attempt to manipulate search engine results or create a link farm. One critical heuristic identified a link to known malicious redirector infrastructure (ggtraff.ru), indicating a malicious intent to redirect users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/pify?keyword=hernia+de+hiato+esofagico+pdf In PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/22844214507.pdfIn PDF document text
    • https://site-1040282.mozfiles.com/files/1040282/pujuxek.pdfIn PDF document text
    • https://site-1039219.mozfiles.com/files/1039219/11918633507.pdfIn PDF document text
    • https://site-1038367.mozfiles.com/files/1038367/18354057536.pdfIn PDF document text
    • https://site-1039150.mozfiles.com/files/1039150/7439847505.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/xabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7428/4446/files/warrior_leveling_guide_classic_alliance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3881/3607/files/categorical_data_analysis_in_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4825/7694/files/effective_ways_of_reading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8449/7575/files/kejegizutijazoxususiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8556/2786/files/mkx_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/17486504959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8660/1626/files/rupipemefekegonozegarugiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1577876d-d465-4487-9db5-17fe54f15c72/bagivupuketejetodus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aba56b4-8a97-4c90-98b5-703dfc114813/jelegerelixigasodiremoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c83ab75-b53a-444c-9633-b43bc6550685/47612137343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c050f560-dfef-44f2-9169-f3f0aafce355/69820955443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf79d4f-a54d-4914-a8bb-6305168ca8e1/bisiloxajozupoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0885bfc6-9c40-44b0-aed2-ef376feec15b/rawabowutot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358e4180-8383-4268-a691-9b0ec4e0a0a2/30016584606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1f5c02-6663-4ade-8306-1b4bae98456a/fenixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd343705-08a4-461f-aef1-cd27ff5c4bba/vazelojugerenoj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C2 5344 bytes
SHA-256: b78ba012e5918b2f6a546dc6b2cb6dc922533725d13e78421aba18e1c5ff3ecc
font_01_sfnt_off000082e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E5 9908 bytes
SHA-256: 2ce40a43718dc25c74f8eb70df65844a702a006b1c410986f65b1783b5cdca42