Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6ac2c828a3c2e0…

MALICIOUS

PDF

33.4 KB Created: 2020-11-07 02:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3df953cb6f3016d6ad2779c82e566a35 SHA-1: 74ef8d3d0afe9b444ec641523eb2b60ebb11b364 SHA-256: 7a6ac2c828a3c2e0e5b3aa32f3b339d1ca8254503348db27997f282da5b4ebc4
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector and a link farm. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous external PDF links suggests a SEO poisoning or link farm tactic to distribute malicious content.

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://gettraff.ru/123?keyword=pandora+bracelet+sizes+guide
    • https://tuxitusonodedin.weebly.com/uploads/1/3/0/8/130873989/xobipovuxe_woneviziredol_xumutebifap.pdf
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/7359286.pdf
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/7202369.pdf
    • https://titamifafipife.weebly.com/uploads/1/3/4/3/134315234/9522782.pdf
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/171919.pdf
    • https://ririrufazerox.weebly.com/uploads/1/3/4/5/134501654/kejidopulo.pdf
    • https://toziraza.weebly.com/uploads/1/3/4/5/134506396/jaxasizenidaf-nalutakevovuz-xaribiza.pdf
    • https://votewisuzub.weebly.com/uploads/1/3/4/6/134605747/tewaleribep.pdf
    • https://nupanirofedodav.weebly.com/uploads/1/3/4/4/134470916/finokexag.pdf
    • https://nikokitigo.weebly.com/uploads/1/3/4/5/134500207/7207483.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/tigav-keponomisisize-nuwimulaxa.pdf
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/973492c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wukifopagoso.files.wordpress.com/2020/11/filme_el_metodo_dublado.pdf
    • https://uploads.strikinglycdn.com/files/e8e42b10-2a48-49b2-849e-c3e205199582/86154332406.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_off000046f3.bin
e9be60251b637917a6c451fc86ce5b034925512d936464c586b59e3602329e63
pdf-font-stream PDF embedded font (sfnt) at offset 0x46F3 5296 bytes
font_01_sfnt_off00005907.bin
bc6a4a3954babc01d00840b8e310fac93fcaaaf6cd1dbe9e52abb7eae286f782
pdf-font-stream PDF embedded font (sfnt) at offset 0x5907 9360 bytes