Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c43497e6cd9d5f2…

MALICIOUS

PDF

42.7 KB Created: 2020-10-28 21:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d82b13cb6a06f4e9e774913eb1e64693 SHA-1: 1958b037c0782cb4125ff7b9d6e98e92347a4b7d SHA-256: 7c43497e6cd9d5f2b4d7da4dea1d60f79709953ad55783d3fcb96f9fc241115a
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/aws?keyword=princess+diana+haircuts+styles'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded link is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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?keyword=princess+diana+haircuts+styles In PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/357a0f.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/9706257.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/dinufarujosuwop_butib.pdfIn PDF document text
    • https://piziruzebizopu.weebly.com/uploads/1/3/4/3/134350425/fenokodivejewekelol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/kozobumax.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/supply_chain_management_resume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1653aa66-2238-4243-be00-4209a9ab2241/weatherking_furnace_model_80pj07ear01_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8304/1430/files/avalon_anders_wish_me_luck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a2ac1d0-324b-45b8-9588-93dbaa541667/bewomaxudepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f959c7ab-5d95-4c8e-af66-60f5f7393a05/school_uniforms_and_individuality.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4148/4700/files/kristine_debell_nude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043d7d4f-a142-44cb-8085-f8bb640715b1/lexesuzixapebegijelozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/8819/1906/files/top_hardest_android_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7416/9248/files/18206539623.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/advanced_business_vocabulary_in_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040837ac-dd7b-4da1-af20-f9b6f7337b65/mogikag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8213/6734/files/xerafegonaferuro.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/human_virology_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/bharatha_rajyangam_telugu_free_download.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_off000067b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B7 5132 bytes
SHA-256: 026b5688facdf94d6e92290efda4481293ca82e380c9d52f82f7c470dacd01ad
font_01_sfnt_off0000792a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792A 10820 bytes
SHA-256: ccb60c9d1d29a0d2c4763b3b77fce88fe3c5631efbce659430f17a04b5c4d7b3

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