Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82dfeedd2c72ddc…

MALICIOUS

PDF

40.8 KB Created: 2020-11-03 11:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9350f440052f4c659cf39065405e74d3 SHA-1: d285bc36d13e0bf69c6c8033e6f0054aafe29850 SHA-256: b82dfeedd2c72ddc7cd97e540d1e491afb9ec536d09ad842924a5c9658683e7c
94 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, one of which is identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'Manual for vizio 55 inch smart tv'. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload or phish for credentials. No scripts were extracted, but the presence of a malicious redirector strongly indicates a phishing or malware distribution attempt.

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://ttraff.ru/123?keyword=manual+for+vizio+55+inch+smart+tv
    • https://cdn-cms.f-static.net/uploads/4422386/normal_5f9fa5e4e15fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0c99bd7b-88a1-4717-a24c-d1b61a6ee621/98426490102.pdf
    • https://s3.amazonaws.com/kotenu/81221940148.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/francoise_sagan_bonjour_tristesse_english.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/37594221965.pdf
    • https://uploads.strikinglycdn.com/files/54300e73-6e93-47d9-815d-bea93a0e3bba/saint_denis_vampire.pdf
    • https://uploads.strikinglycdn.com/files/a85bcf27-733d-4876-871f-f98edebef925/febikunadovonobedelun.pdf
    • https://uploads.strikinglycdn.com/files/2944af6f-a81d-4752-96bf-e659c0049217/5508729230.pdf
    • https://uploads.strikinglycdn.com/files/c4409db9-f7fe-400b-a3c1-7efeb99cfa54/numro_d_organisme_de_rattachement_s.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d1.bin
01e7152ef3d522c70143f73f86113ad67db5e717132978f9af7961494343ce03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 5360 bytes
font_01_sfnt_off00007408.bin
9d80589c9fd59545e77dacc7382e538cb330cdfae68f2f02af9ca9cccaa224f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7408 10132 bytes

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