Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd4f60f5bfd0f3b…

MALICIOUS

PDF

66.6 KB Created: 2020-08-10 21:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dff2954fcf596ee1ddd3d207337f3905 SHA-1: ead8800e8779c53b6fa081180c6d12b8dbbae531 SHA-256: 4fd4f60f5bfd0f3bf335f9e9a73b9fddc5c38a80db8613e94515a7cad39093f1
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as 'bodmas worksheets for grade 6 with answers pdf'. The ML classifier strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, indicating a social engineering attempt to redirect users to harmful 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://ttraff.ru/pify?keyword=bodmas+worksheets+for+grade+6+with+answers+pdf
    • http://sukijopon.prettydarnperfect.com/uploads/1/3/1/3/131380600/nevepitazizisenin.pdf
    • http://files.commerciallfc.com/uploads/1/3/0/8/130814208/fivabi-gotakekitezoxor-mufuseraxe-rovaxawe.pdf
    • http://files.hhsmusicboosters.com/uploads/1/3/1/3/131384113/4153554.pdf
    • http://files.cradkilodney.com/uploads/1/3/1/3/131381414/medoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/tofavategi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/55452407952.pdf
    • https://cdn.shopify.com/s/files/1/0452/3776/4256/files/centrales_solares_termicas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/spark_big_data_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/17634503673.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/49570373247.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/mayo_clinic_antimicrobial_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/kerogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/15066370917.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/32552887872.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodowowesibaxen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9b1.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B1 2828 bytes
font_01_sfnt_off0000c3ab.bin
56e9c13de850c33d696d6e08595ce3c90ffd189eb5954d16ef9608be0eeeba3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AB 5784 bytes
font_02_sfnt_off0000d74b.bin
f5a6254c9a6fe486af19fc992e3e876bd06ce90748106a7844998fe787622c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD74B 10376 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.