Malicious PDF — malware analysis report

Static analysis result for SHA-256 1041dba6d536bb07…

MALICIOUS

PDF

58.8 KB Created: 2020-12-19 22:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b019f4ec93dc97ec718e2d5b810b864f SHA-1: 9110075ec1f8e87d914727eb62f89fa4ac1b6014 SHA-256: 1041dba6d536bb0772f87f1ff9f19c3e5de6d5b036c76419e77732f658685189
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous links to external websites, masquerading as a wallpaper download. The primary link, 'https://ggtraff.ru/aws?utm_term=wallpaper+for+whatsapp+profile+picture', is identified as a malicious redirector. The document's structure and the high number of outbound links suggest a link farm or phishing attempt, aiming to direct users to potentially malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/aws?utm_term=wallpaper+for+whatsapp+profile+picture In PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fc0645503831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_5fd2238676084.pdfIn PDF document text
    • https://gegawega.weebly.com/uploads/1/3/0/7/130739786/jujipiraribejujawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447663/normal_5f9ea16660262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448746/normal_5fcd37aca9a45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f8956ae10bb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493198/normal_5fbd1430a1496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477620/normal_5fbc202e60127.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://uploads.strikinglycdn.com/files/8462e29b-5b35-4e14-93e0-437f44727253/things_fall_apart_kola_nut_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0b65f0-0f21-4541-aa9d-156f5ca44b31/14116401688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6916250-44ca-4dbc-bd82-7a0037947280/jukagoxenaju.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_off0000a31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA31F 4984 bytes
SHA-256: 8d4ba2bd38742d6f03cbd46191f430e9619ebe3d90d3cd91fc755f74eb5ba970
font_01_sfnt_off0000b444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB444 8252 bytes
SHA-256: d46cdd5b6d1f7ae5d595b75fba40817e70a446fd9b7d1e7ae7d35df7efa47617
font_02_sfnt_off0000d056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD056 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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