Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3821d8e55f84fbd…

MALICIOUS

PDF

84.6 KB Created: 2020-08-31 06:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e574723e4f25117c3ee4abbbfe91bc93 SHA-1: c5f1b1c826e6e1177fc57162efd8c3b2bd69d7cd SHA-256: f3821d8e55f84fbdcd44ff5b3fa4aaf6926771cf18f6c4f43cb29a6e652b830d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a URL associated with malicious redirector infrastructure, specifically advertising an 'autodesk 2018 serial number and product key crack'. This indicates a phishing or scam attempt to lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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.club/wix?keyword=autodesk+2018+serial+number+and+product+key+crack
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/4413345096.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/salurarozudatapomevotut.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/clothes_and_accessories_vocabulary_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/83058255540.pdf
    • https://cdn.shopify.com/s/files/1/0447/5237/1863/files/colostomy_care.pdf
    • https://cdn.shopify.com/s/files/1/0431/5483/3557/files/boneless_chicken_breast_fillet_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/37387414422.pdf
    • https://cdn.shopify.com/s/files/1/0459/7248/8359/files/dovitafekorixerepafaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/32330359679.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/fetixiximuxuwafudopalom.pdf
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/baderulopil.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/walububabiwekaxiwaginopon.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/42324192519.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100f4.bin
6e60b4e8b31f84faa91c9a31b4c64df7ef2488833e3c7ec95a0183f4ef53f482
pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 6032 bytes
font_01_sfnt_off0001156d.bin
3d7bda1da71b0c16e8e5054f06690b30812662f1614a9a8ab4b2ebd0cc0ac4a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1156D 15668 bytes