Malicious PDF — malware analysis report

Static analysis result for SHA-256 594b34a2f4d49f06…

MALICIOUS

PDF

49.8 KB Created: 2020-10-30 00:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0d62c515012806a5f2ac93d31b8afa49 SHA-1: 74a29e5263d2b28869e78e3321d789366b65095a SHA-256: 594b34a2f4d49f0625f75daf737e47fa8fde7b6b27de2058eedce64899d5c90c
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the text "Air standard cycles notes" and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links, many pointing to benign external resources, indicates a potential link farm or SEO manipulation tactic to obscure the malicious intent.

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.ru/123?keyword=air+standard+cycles+notes In 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/8abe975d-2f9b-434b-84d7-3d79cfde6314/javokodivakoxarajajaxamod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df78bea5-52f5-4835-b60c-8dfa21f4ce54/bewoxunimarif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62987aa2-e86a-4847-bdc5-adba10aba71d/hoodoo_honey_and_sugar_spells.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6377/6677/files/the_urban_design_reader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/7436/8699/files/rijikuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/71830262365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7834/2598/files/81582564186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3474/5253/files/miwudaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7754/3107/files/lincoln_park_golf_course_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3925/1870/files/fileselojuwoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fdcb54-2588-47c6-81df-41ac17cb3919/noramepulujujapodefetul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/wolf_among_us_mod_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/85285759400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d0cddf-a5ad-4970-9c57-37083e505e8d/integrated_korean_beginning_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7978/2566/files/kim_him-chan_wikipedia.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_off0000774f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774F 4812 bytes
SHA-256: 31e1aeeb0fb572bf0a6bea8ce661ddaf9da80117d253ac6d0c209ea257e86a04
font_01_sfnt_off000087a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A7 10732 bytes
SHA-256: 5c29c07f1af41e08ce2e13edb1bc023edf86322735d4278c90014a034752c6fe
font_02_sfnt_off0000ac0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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