Malicious PDF — malware analysis report

Static analysis result for SHA-256 109e6b694055a0c5…

MALICIOUS

PDF

47.6 KB Created: 2020-10-27 06:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f8f5b4cc7d41af5066274941b67fc630 SHA-1: 2373f02a20b57e8ed51743ebc8ca6039d54fb6ac SHA-256: 109e6b694055a0c57f257e7e43457f76e7e3cff5ee93e511ba75bdc9ea610052
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many pointing to PDF files hosted on Shopify and Strikingly, which is indicative of an SEO link farm. One of the primary links, 'https://ggtraff.ru/strik?keyword=byzantine+quorum+systems', is flagged as a known malicious redirector. This suggests the document is designed to lure users through search engines or by presenting a large number of seemingly legitimate links, ultimately redirecting them to malicious infrastructure.

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/strik?keyword=byzantine+quorum+systems In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8732ef432ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5f8e929e800de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f96a3843f2ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_5f8e8d9bc44f3.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://cdn.shopify.com/s/files/1/0502/7705/6709/files/63470497450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/lipufilazemuxig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9770/1017/files/4850765625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/kexuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/large_digital_wall_clock_battery_operated.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9683e49-f3d7-4dd1-9d8a-8def05bd3e6f/zigiraziteve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190fb7fa-15e6-4ad7-bd82-8f68bd5a5c57/kimepusuxifejatisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7796/9069/files/game_champ_game_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3509/7770/files/baxapejomuwumisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7679/5548/files/suwedimowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4303/5562/files/juegos_game_boy_android_doperoms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92402c77-6cf1-4d77-a219-ca07e45f1ac1/razuzudemexawexoxaxakido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98dcb054-dbe0-4a45-b136-41b17c70644c/xobajufawujotovusoguz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96978c41-0f9c-4722-b335-930d1115bb38/wowovikopedivulifokejulot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1849/3336/files/jetaudio_plus_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/tirija.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_off00006f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 5008 bytes
SHA-256: e2d5595786ad1f3cc16789acd4ca0ed0c22fa81a60de651daa34c7ab10572dbb
font_01_sfnt_off00008016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8016 10332 bytes
SHA-256: f6bd287af6b3b59dd19aad6bec94577a69593ab19ec080102ae8e5d183aac0b4
font_02_sfnt_off0000a346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA346 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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