Malicious PDF — malware analysis report

Static analysis result for SHA-256 f940f7bb4f50cbca…

MALICIOUS

PDF

47.1 KB Created: 2020-10-27 11:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6f1814a5de2458f291fa6acd55a877e0 SHA-1: 3c31c7420d0c030affaf2410d0a42907d809b010 SHA-256: f940f7bb4f50cbca0fa84f17114b8ffa1bda8286f8c0e97430982541758bf410
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the search query 'Linens and things curtains' and the malicious redirector URL, suggesting a lure to a potentially malicious site. The ML classifier 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://ttraff.cc/123?keyword=linens+and+things+curtains In PDF document text
    • https://roxunasof.weebly.com/uploads/1/3/4/3/134312726/188b8684e.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/3471586ae14859.pdfIn PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/b60602f9.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zidebesirolabavo.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/wijelifepixev-xoxiritug-bubixiwapamoxis-jojebaxadeji.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/1bf9fe786c5ed4b.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/1/0266/9137/1196/files/voice_translate_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8281/2066/files/2605144442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0934/9036/files/55690981639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e672ff8b-d658-4e5b-8a99-e3203a45c6ea/a_silent_voice_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5dc750-fd91-4f0c-9764-81056046637f/examples_of_cultural_patterns_intercultural_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210e3121-55cc-4c3b-85ee-5b451b81895a/56158643330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7937/1414/files/gallon_of_ice_cream_calories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0634/0515/files/yellow_color_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8351/9918/files/donuts_wallpaper_hd_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1109/0850/files/msr_whisperlite_universal_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16e649e-7fc2-4e74-8adb-c4390df05a85/18587708547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08fff2b-14fa-4167-a746-6cabf3917a91/6737892819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b87e93dd-efbf-4e2a-95ea-fa7bafeca563/gutifipakolupelobevesawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b473c6-7f86-4649-89aa-c94e766ab36f/8365107022.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_off00007599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7599 5108 bytes
SHA-256: 1e9c27d5aacfe5792e19e340e1c82b6bd7e677cb30d1bf75dbad9edda0337043
font_01_sfnt_off000086ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EF 12084 bytes
SHA-256: 052a1876239346a31f67c448c501f123900e3492f1a10baeb97cb4e5e137b359

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